RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy18202
(357 letters)
>gnl|CDD|153308 cd07624, BAR_SNX7_30, The Bin/Amphiphysin/Rvs (BAR) domain of
Sorting Nexins 7 and 30. BAR domains are dimerization,
lipid binding and curvature sensing modules found in
many different proteins with diverse functions. Sorting
nexins (SNXs) are Phox homology (PX) domain containing
proteins that are involved in regulating membrane
traffic and protein sorting in the endosomal system.
SNXs differ from each other in their lipid-binding
specificity, subcellular localization and specific
function in the endocytic pathway. A subset of SNXs also
contain BAR domains. The PX-BAR structural unit
determines the specific membrane targeting of SNXs. This
subfamily consists of SNX7, SNX30, and similar proteins.
The specific functions of SNX7 and SNX30 have not been
elucidated. BAR domains form dimers that bind to
membranes, induce membrane bending and curvature, and
may also be involved in protein-protein interactions.
Length = 200
Score = 142 bits (360), Expect = 5e-41
Identities = 75/237 (31%), Positives = 119/237 (50%), Gaps = 50/237 (21%)
Query: 114 NIYTTMS-LRHHHSEFEQFSQYISNLYEKISAFEKIGTRLYKERKDYVSEAHQFAIVLNT 172
+TM L++ EF++ ++Y++ EK+ E+I R++KER +Y E +++ +
Sbjct: 1 RNTSTMYLLKNRSPEFDKMNEYLTLFGEKLGTIERISQRIHKERIEYFDELKEYSPIFQL 60
Query: 173 WAGYEPQLSSVIRQVSKAVDT-TASLHKNLLIEPFHEHNSHPMKDYLMYIDAVKQVLARR 231
W+ E +L+ ++ VS AV+ TA+L L F P+++YL+Y DAVK VL RR
Sbjct: 61 WSASETELAPLLEGVSSAVERCTAALEVLLSDHEFVFLP--PLREYLLYSDAVKDVLKRR 118
Query: 232 DVIQAEHDMCGEELQKKTAEKEQLTNKDSDSSSPTSSTATSSTNSYSLWKSTSEDRLEKL 291
D Q E+++ EEL KK E
Sbjct: 119 DQFQIEYELSVEELNKKRLE---------------------------------------- 138
Query: 292 STAIPKLTSQLEICDEKLQTANNHLRSDLERWRLEKKNDLKKILLKIADQQIAYYQQ 348
L ++E +KL+ AN L++DLERW+ K+ DLKKILL +A++QI YY+Q
Sbjct: 139 ------LLKEVEKLQDKLECANADLKADLERWKQNKRQDLKKILLDMAEKQIQYYEQ 189
>gnl|CDD|132770 cd06860, PX_SNX7_30_like, The phosphoinositide binding Phox
Homology domain of Sorting Nexins 7 and 30. The PX
domain is a phosphoinositide (PI) binding module present
in many proteins with diverse functions. Sorting nexins
(SNXs) make up the largest group among PX domain
containing proteins. They are involved in regulating
membrane traffic and protein sorting in the endosomal
system. The PX domain of SNXs binds PIs and targets the
protein to PI-enriched membranes. SNXs differ from each
other in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway. Some SNXs
are localized in early endosome structures such as
clathrin-coated pits, while others are located in late
structures of the endocytic pathway. This subfamily
consists of SNX7, SNX30, and similar proteins. They
harbor a Bin/Amphiphysin/Rvs (BAR) domain, which detects
membrane curvature, C-terminal to the PX domain, similar
to the sorting nexins SNX1-2, SNX4-6, SNX8, and SNX32.
Both domains have been shown to determine the specific
membrane-targeting of SNX1. The specific function of the
sorting nexins in this subfamily has yet to be
elucidated.
Length = 116
Score = 131 bits (331), Expect = 9e-38
Identities = 50/87 (57%), Positives = 62/87 (71%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKL 60
EF +E VRRRY DF+WL KL E+ P+HIIPPLPEKHS+ L+R+S EF+ RM+
Sbjct: 30 SEFDSSEYSVRRRYQDFLWLRQKLEESHPTHIIPPLPEKHSVKGLLDRFSPEFVATRMRA 89
Query: 61 LDQFLRRVTSHPVLSVNSHAIIFLTAK 87
L +FL R+ HPVLS N H +FLTAK
Sbjct: 90 LHKFLNRIVEHPVLSFNEHLKVFLTAK 116
>gnl|CDD|153351 cd07667, BAR_SNX30, The Bin/Amphiphysin/Rvs (BAR) domain of Sorting
Nexin 30. BAR domains are dimerization, lipid binding
and curvature sensing modules found in many different
proteins with diverse functions. Sorting nexins (SNXs)
are Phox homology (PX) domain containing proteins that
are involved in regulating membrane traffic and protein
sorting in the endosomal system. SNXs differ from each
other in their lipid-binding specificity, subcellular
localization and specific function in the endocytic
pathway. A subset of SNXs also contain BAR domains. The
PX-BAR structural unit determines the specific membrane
targeting of SNXs. The specific function of SNX30 is
still unknown. BAR domains form dimers that bind to
membranes, induce membrane bending and curvature, and
may also be involved in protein-protein interactions.
Length = 240
Score = 120 bits (302), Expect = 4e-32
Identities = 75/278 (26%), Positives = 134/278 (48%), Gaps = 49/278 (17%)
Query: 71 HPVLSVNSHAIIFLTAKLAEFSMHKKHSPGLLNKMSESFYNLTNIYTTMSLRHHHSEFEQ 130
HPVLS N H +FLTAK + + +KK LL+KM ES +T Y LR EF
Sbjct: 1 HPVLSFNEHFNVFLTAK--DLNAYKKQGIALLSKMGESVKYVTGGY---KLRSRPLEFAA 55
Query: 131 FSQYISNLYEKISAFEKIGTRLYKERKDYVSEAHQFAIVLNTWAGYEPQLSSVIRQVSKA 190
Y+ K+ ++I R+ KE +Y+ E ++ V +TW+G E +L+ + VS
Sbjct: 56 IGDYLDTFALKLGTIDRIAQRIIKEEIEYLVELREYGPVYSTWSGLEGELAEPLEGVSAC 115
Query: 191 VDTTASLHKNLLIEPFHEHNSHPMKDYLMYIDAVKQVLARRDVIQAEHDMCGEELQKKTA 250
+ ++ + L E E +++Y++Y +++K VL +RD +QAE++ E + +
Sbjct: 116 IGNCSTALEE-LTEDMTEDFLPVLREYILYSESMKNVLKKRDQVQAEYEAKLEAVALRKE 174
Query: 251 EKEQLTNKDSDSSSPTSSTATSSTNSYSLWKSTSEDRLEKLSTAIPKLTSQLEICDEKLQ 310
E+ PK+ + +E C ++++
Sbjct: 175 ER-------------------------------------------PKVPTDVEKCQDRVE 191
Query: 311 TANNHLRSDLERWRLEKKNDLKKILLKIADQQIAYYQQ 348
N L++D+ERW+ K+ D +++L+ +AD+ I YY++
Sbjct: 192 CFNADLKADMERWQNNKRQDFRQLLMGMADKNIQYYEK 229
>gnl|CDD|153350 cd07666, BAR_SNX7, The Bin/Amphiphysin/Rvs (BAR) domain of Sorting
Nexin 7. BAR domains are dimerization, lipid binding
and curvature sensing modules found in many different
proteins with diverse functions. Sorting nexins (SNXs)
are Phox homology (PX) domain containing proteins that
are involved in regulating membrane traffic and protein
sorting in the endosomal system. SNXs differ from each
other in their lipid-binding specificity, subcellular
localization and specific function in the endocytic
pathway. A subset of SNXs also contain BAR domains. The
PX-BAR structural unit determines the specific membrane
targeting of SNXs. The specific function of SNX7 is
still unknown. BAR domains form dimers that bind to
membranes, induce membrane bending and curvature, and
may also be involved in protein-protein interactions.
Length = 243
Score = 114 bits (286), Expect = 8e-30
Identities = 76/285 (26%), Positives = 136/285 (47%), Gaps = 60/285 (21%)
Query: 71 HPVLSVNSHAIIFLTAKLAEFSMHKKHSPGLLNKMSESFYNLTNIYTTMSLRHHHSEFEQ 130
HP L+ N IFLTA+ E S HKK PGLL++M ++ + + + +++ EF +
Sbjct: 1 HPTLTFNEDFKIFLTAQAWELSSHKKQGPGLLSRMGQTVKAVAS--SVRGVKNRPEEFTE 58
Query: 131 FSQYISNLYEKISAFEKIGTRLYKERKDYVSEAHQFAIVLNTWAGYEPQLSSVIRQVSKA 190
++Y+ +KI+ +KI R+YKE+++Y E ++ + W+ E +L+ ++ ++
Sbjct: 59 MNEYVEAFSQKINVLDKISQRIYKEQREYFEELKEYGPIYTLWSASEEELADSLKGMASC 118
Query: 191 VD----TTASLHKNL---LIEPFHEHNSHPMKDYLMYIDAVKQVLARRDVIQAEHDMCGE 243
+D T K L L+ HE Y++Y + + V+ RRD IQAE D E
Sbjct: 119 IDRCCKATDKRMKGLSEQLLPVIHE--------YVLYSETLMGVIKRRDQIQAELDSKVE 170
Query: 244 ELQKKTAEKEQLTNKDSDSSSPTSSTATSSTNSYSLWKSTSEDRLEKLSTAIPKLTSQLE 303
L K A+++ L ++ +EKL
Sbjct: 171 ALANKKADRDLL-----------------------------KEEIEKL------------ 189
Query: 304 ICDEKLQTANNHLRSDLERWRLEKKNDLKKILLKIADQQIAYYQQ 348
++K++ ANN L++D ERW+ + DL+ +A+ I+YY++
Sbjct: 190 --EDKVECANNALKADWERWKQNMQTDLRSAFTDMAENNISYYEE 232
>gnl|CDD|132816 cd07283, PX_SNX30, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 30. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. Some SNXs are localized in
early endosome structures such as clathrin-coated pits,
while others are located in late structures of the
endocytic pathway. SNX30 harbors a Bin/Amphiphysin/Rvs
(BAR) domain, which detects membrane curvature,
C-terminal to the PX domain, similar to the sorting
nexins SNX1-2, SNX4-8, and SNX32. Both domains have been
shown to determine the specific membrane-targeting of
SNX1. The specific function of SNX30 has yet to be
elucidated.
Length = 116
Score = 97.1 bits (241), Expect = 9e-25
Identities = 48/86 (55%), Positives = 61/86 (70%)
Query: 2 EFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLL 61
EF E VRRRY DF WL NKL E+ P+H+IPPLPEK + ++R+S+EF+ R K L
Sbjct: 31 EFDLPEYSVRRRYQDFDWLRNKLEESQPTHLIPPLPEKFVVKGVVDRFSEEFVETRRKAL 90
Query: 62 DQFLRRVTSHPVLSVNSHAIIFLTAK 87
D+FL+R+ HPVLS N H +FLTAK
Sbjct: 91 DKFLKRIADHPVLSFNEHFNVFLTAK 116
>gnl|CDD|132773 cd06863, PX_Atg24p, The phosphoinositide binding Phox Homology
domain of yeast Atg24p, an autophagic degradation
protein. The PX domain is a phosphoinositide (PI)
binding module present in many proteins with diverse
functions. The yeast Atg24p is a sorting nexin (SNX)
which is involved in membrane fusion events at the
vacuolar surface during pexophagy. This is facilitated
via binding of Atg24p to phosphatidylinositol
3-phosphate (PI3P) through its PX domain. SNXs make up
the largest group among PX domain containing proteins.
They are involved in regulating membrane traffic and
protein sorting in the endosomal system. The PX domain
of SNXs binds PIs and targets the protein to PI-enriched
membranes. SNXs differ from each other in PI-binding
specificity and affinity, and the presence of other
protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway.
Length = 118
Score = 95.4 bits (238), Expect = 3e-24
Identities = 41/87 (47%), Positives = 56/87 (64%), Gaps = 3/87 (3%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHL--NRYSKEFILCRM 58
P F E VRRRY+DFV+LH L P+ ++PPLP+KH LE++ +R+S EFI R
Sbjct: 31 PSFSRKEFKVRRRYSDFVFLHECLSNDFPACVVPPLPDKHR-LEYITGDRFSPEFITRRA 89
Query: 59 KLLDQFLRRVTSHPVLSVNSHAIIFLT 85
+ L +FLRR++ HPVLS + FL
Sbjct: 90 QSLQRFLRRISLHPVLSQSKILHQFLE 116
>gnl|CDD|132769 cd06859, PX_SNX1_2_like, The phosphoinositide binding Phox Homology
domain of Sorting Nexins 1 and 2. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. This subfamily consists of
SNX1, SNX2, and similar proteins. They harbor a
Bin/Amphiphysin/Rvs (BAR) domain, which detects membrane
curvature, C-terminal to the PX domain. Both domains
have been shown to determine the specific
membrane-targeting of SNX1. SNX1 and SNX2 are components
of the retromer complex, a membrane coat multimeric
complex required for endosomal retrieval of lysosomal
hydrolase receptors to the Golgi. The retromer consists
of a cargo-recognition subcomplex and a subcomplex
formed by a dimer of sorting nexins (SNX1 and/or SNX2),
which ensures effcient cargo sorting by facilitating
proper membrane localization of the cargo-recognition
subcomplex.
Length = 114
Score = 85.7 bits (213), Expect = 1e-20
Identities = 36/86 (41%), Positives = 53/86 (61%), Gaps = 2/86 (2%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKL 60
P+F +E V RRY+DF+WL+ +LVE P I+PP PEK ++ + EFI R
Sbjct: 30 PDFKKSEFSVLRRYSDFLWLYERLVEKYPGRIVPPPPEKQAV--GRFKVKFEFIEKRRAA 87
Query: 61 LDQFLRRVTSHPVLSVNSHAIIFLTA 86
L++FLRR+ +HPVL + +FL +
Sbjct: 88 LERFLRRIAAHPVLRKDPDFRLFLES 113
>gnl|CDD|132817 cd07284, PX_SNX7, The phosphoinositide binding Phox Homology domain
of Sorting Nexin 7. The PX domain is a phosphoinositide
(PI) binding module present in many proteins with
diverse functions. Sorting nexins (SNXs) make up the
largest group among PX domain containing proteins. They
are involved in regulating membrane traffic and protein
sorting in the endosomal system. The PX domain of SNXs
binds PIs and targets the protein to PI-enriched
membranes. SNXs differ from each other in PI-binding
specificity and affinity, and the presence of other
protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. Some SNXs are localized in
early endosome structures such as clathrin-coated pits,
while others are located in late structures of the
endocytic pathway. SNX7 harbors a Bin/Amphiphysin/Rvs
(BAR) domain, which detects membrane curvature,
C-terminal to the PX domain, similar to the sorting
nexins SNX1-2, SNX4-6, SNX8, SNX30, and SNX32. Both
domains have been shown to determine the specific
membrane-targeting of SNX1. The specific function of
SNX7 has yet to be elucidated.
Length = 116
Score = 84.6 bits (209), Expect = 3e-20
Identities = 41/86 (47%), Positives = 55/86 (63%)
Query: 2 EFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLL 61
EF +E VRRRY DF+WL +L E P+ IIPPLPEK + + R++++FI R K L
Sbjct: 31 EFDSSEFEVRRRYQDFLWLKGRLEEAHPTLIIPPLPEKFVMKGMVERFNEDFIETRRKAL 90
Query: 62 DQFLRRVTSHPVLSVNSHAIIFLTAK 87
+FL R+ HP L+ N IFLTA+
Sbjct: 91 HKFLNRIADHPTLTFNEDFKIFLTAQ 116
>gnl|CDD|153280 cd07596, BAR_SNX, The Bin/Amphiphysin/Rvs (BAR) domain of Sorting
Nexins. BAR domains are dimerization, lipid binding and
curvature sensing modules found in many different
proteins with diverse functions. Sorting nexins (SNXs)
are Phox homology (PX) domain containing proteins that
are involved in regulating membrane traffic and protein
sorting in the endosomal system. SNXs differ from each
other in their lipid-binding specificity, subcellular
localization and specific function in the endocytic
pathway. A subset of SNXs also contain BAR domains. The
PX-BAR structural unit determines the specific membrane
targeting of SNXs. BAR domains form dimers that bind to
membranes, induce membrane bending and curvature, and
may also be involved in protein-protein interactions.
Length = 218
Score = 86.6 bits (215), Expect = 5e-20
Identities = 53/229 (23%), Positives = 95/229 (41%), Gaps = 27/229 (11%)
Query: 127 EFEQFSQYISNLYEKISAFEKIGTRLYKERKDYVSEAHQFAIVLNTWAGYEPQ----LSS 182
EFE+ YI L E++ K RL K R++ S +F L A E + L
Sbjct: 5 EFEEAKDYILKLEEQLKKLSKQAQRLVKRRRELGSALGEFGKALIKLAKCEEEVGGELGE 64
Query: 183 VIRQVSKAVDTTASLHKNLLIEPFHEHNSHPMKDYLMYIDAVKQVLARRDVIQAEHDMCG 242
+ ++ KA + +SL + + + P+K+YL Y AVK+ L R
Sbjct: 65 ALSKLGKAAEELSSLSEAQANQELVKLLE-PLKEYLRYCQAVKETLDDRADALLTLQSLK 123
Query: 243 EELQKKTAEKEQLTNKDSDSSSPTSSTATSSTNSYSLWKSTSEDRLEKLSTAIPKLTSQL 302
++L K A+ E+L ++E+L + + S L
Sbjct: 124 KDLASKKAQLEKLKAA----------------------PGIKPAKVEELEEELEEAESAL 161
Query: 303 EICDEKLQTANNHLRSDLERWRLEKKNDLKKILLKIADQQIAYYQQRSD 351
E ++ + + L+ +L+R+ E+ DLK L + A Q+ Y ++ ++
Sbjct: 162 EEARKRYEEISERLKEELKRFHEERARDLKAALKEFARLQVQYAEKIAE 210
>gnl|CDD|227680 COG5391, COG5391, Phox homology (PX) domain protein [Intracellular
trafficking and secretion / General function prediction
only].
Length = 524
Score = 90.2 bits (224), Expect = 8e-20
Identities = 84/347 (24%), Positives = 142/347 (40%), Gaps = 20/347 (5%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHL-NRYSKEFILCRMKLLDQFLRRV 68
VRRRY+DF LH+ L++ LP IPPLP K S E+ +R+S EFI R + L FLRRV
Sbjct: 175 VRRRYSDFESLHSILIKLLPLCAIPPLPSKKSNSEYYGDRFSDEFIEERRQSLQNFLRRV 234
Query: 69 TSHPVLS--VNSHAIIFLTAKLAEFSMHKKHSPGLLNKMSESFYNLTNIYTTMSLRHHHS 126
++HP+LS NS + + L+ F N+ S ++ +T
Sbjct: 235 STHPLLSNYKNSKSWESHSTLLSSFI---------ENRKSVPTPLSLDLTSTTQELDMER 285
Query: 127 EF--EQFSQYISNLYEKISAFEKIGTRLYKERKDYVSEAHQFAIVLNTWAGYEPQLSSVI 184
+ E S+ I N+ S FEKI +L E + +L + + +
Sbjct: 286 KELNESTSKAIHNILSIFSLFEKILIQLESEEESLTRLLESLNNLLLLVLNFSGVFAKRL 345
Query: 185 RQVSKAVDTTASLHK-NLLIEPFHEHN--SHPMKDYLMYIDAVKQVLARRDVIQAEHDMC 241
Q ++ + L +K I + D + +
Sbjct: 346 EQNQNSILNEGVVQAETLRSSLKELLTQLQDEIKSRESLILTDSNLEKLTDQNLEDVEEL 405
Query: 242 GEELQKKTAEKEQLTNKDSDSSSPTSSTATSSTNSYSLWKSTSEDRLEKLSTAIPKLTSQ 301
L+K ++++ TS + S + + + +E L KL Q
Sbjct: 406 SRSLRKNSSQR---AVVSQQPEGLTSFSKLSYKLRDFVQEKSRSKSIESLQQDKEKLEEQ 462
Query: 302 LEICDEKLQTANNHLRSDLERWRLEKKNDLKKILLKIADQQIAYYQQ 348
L I ++ Q N L+++L+ + + +DL+KIL +AD I + ++
Sbjct: 463 LAIAEKDAQEINEELKNELKFFFSVRNSDLEKILKSVADSHIEWAEE 509
Score = 30.9 bits (70), Expect = 0.99
Identities = 17/91 (18%), Positives = 37/91 (40%), Gaps = 7/91 (7%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHL-------NRYSKEFILCRMKLLD 62
+ R ++F L + L LP+ + PPL H++L++ + + R K
Sbjct: 94 IHSRASEFRSLRDMLSLLLPTSLQPPLSTSHTILDYFISSTVSNPQSLTLLVDSRDKHTS 153
Query: 63 QFLRRVTSHPVLSVNSHAIIFLTAKLAEFSM 93
+ VT+ P + + + + ++F
Sbjct: 154 YEIITVTNLPSFQLRESRPLVVRRRYSDFES 184
>gnl|CDD|216119 pfam00787, PX, PX domain. PX domains bind to phosphoinositides.
Length = 109
Score = 71.2 bits (175), Expect = 2e-15
Identities = 33/76 (43%), Positives = 46/76 (60%), Gaps = 4/76 (5%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRVT 69
V+RRY+DF LH +L+ P IIPPLP K R+S+EFI R K L+++L+R+
Sbjct: 36 VKRRYSDFEELHKQLLRKFPGRIIPPLPPKK----LFGRFSEEFIEKRRKGLEEYLQRLL 91
Query: 70 SHPVLSVNSHAIIFLT 85
HP LS + + FL
Sbjct: 92 QHPELSNSEVVLEFLE 107
>gnl|CDD|132768 cd06093, PX_domain, The Phox Homology domain, a phosphoinositide
binding module. The PX domain is a phosphoinositide
(PI) binding module involved in targeting proteins to
membranes. Proteins containing PX domains interact with
PIs and have been implicated in highly diverse functions
such as cell signaling, vesicular trafficking, protein
sorting, lipid modification, cell polarity and division,
activation of T and B cells, and cell survival. Many
members of this superfamily bind
phosphatidylinositol-3-phosphate (PI3P) but in some
cases, other PIs such as PI4P or PI(3,4)P2, among
others, are the preferred substrates. In addition to
protein-lipid interaction, the PX domain may also be
involved in protein-protein interaction, as in the cases
of p40phox, p47phox, and some sorting nexins (SNXs). The
PX domain is conserved from yeast to humans and is found
in more than 100 proteins. The majority of PX
domain-containing proteins are SNXs, which play
important roles in endosomal sorting.
Length = 106
Score = 70.5 bits (173), Expect = 3e-15
Identities = 30/77 (38%), Positives = 39/77 (50%), Gaps = 4/77 (5%)
Query: 9 IVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRV 68
V RRY+DF LH KL + P I+PPLP K EFI R K L+Q+L+ +
Sbjct: 33 TVYRRYSDFEELHEKLKKKFPGVILPPLPPKKL----FGNLDPEFIEERRKQLEQYLQSL 88
Query: 69 TSHPVLSVNSHAIIFLT 85
+HP L + FL
Sbjct: 89 LNHPELRNSEELKEFLE 105
>gnl|CDD|132774 cd06864, PX_SNX4, The phosphoinositide binding Phox Homology domain
of Sorting Nexin 4. The PX domain is a phosphoinositide
(PI) binding module present in many proteins with
diverse functions. Sorting nexins (SNXs) make up the
largest group among PX domain containing proteins. They
are involved in regulating membrane traffic and protein
sorting in the endosomal system. The PX domain of SNXs
binds PIs and targets the protein to PI-enriched
membranes. SNXs differ from each other in PI-binding
specificity and affinity, and the presence of other
protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. SNX4 is involved in recycling
traffic from the sorting endosome (post-Golgi endosome)
back to the late Golgi. It shows a similar domain
architecture as SNX1-2, among others, containing a
Bin/Amphiphysin/Rvs (BAR) domain, which detects membrane
curvature, C-terminal to the PX domain. SNX4 is
implicated in the regulation of plasma membrane receptor
trafficking and interacts with receptors for EGF,
insulin, platelet-derived growth factor and the long
form of the leptin receptor.
Length = 129
Score = 70.5 bits (173), Expect = 5e-15
Identities = 30/87 (34%), Positives = 42/87 (48%), Gaps = 4/87 (4%)
Query: 3 FPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLN----RYSKEFILCRM 58
+ RRY++F L N LV T P I+PPLPEK ++ + +F+ R
Sbjct: 41 LSKKLSSLWRRYSEFELLRNYLVVTYPYVIVPPLPEKRAMFMWQKLSSDTFDPDFVERRR 100
Query: 59 KLLDQFLRRVTSHPVLSVNSHAIIFLT 85
L+ FL RV HP L + + FLT
Sbjct: 101 AGLENFLLRVAGHPELCQDKIFLEFLT 127
>gnl|CDD|132772 cd06862, PX_SNX9_18_like, The phosphoinositide binding Phox
Homology domain of Sorting Nexins 9 and 18. The PX
domain is a phosphoinositide (PI) binding module present
in many proteins with diverse functions. Sorting nexins
(SNXs) make up the largest group among PX domain
containing proteins. They are involved in regulating
membrane traffic and protein sorting in the endosomal
system. The PX domain of SNXs binds PIs and targets the
protein to PI-enriched membranes. SNXs differ from each
other in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway. This
subfamily consists of SNX9, SNX18, and similar proteins.
They contain an N-terminal Src Homology 3 (SH3) domain,
a PX domain, and a C-terminal Bin/Amphiphysin/Rvs (BAR)
domain. SNX9 is localized to plasma membrane endocytic
sites and acts primarily in clathrin-mediated
endocytosis, while SNX18 is localized to peripheral
endosomal structures, and acts in a trafficking pathway
that is clathrin-independent but relies on AP-1 and
PACS1.
Length = 125
Score = 69.3 bits (170), Expect = 1e-14
Identities = 33/81 (40%), Positives = 44/81 (54%), Gaps = 10/81 (12%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRVT 69
V RRY F WL+ +LVE IPPLPEK + R+ ++FI R + L+ ++ R+
Sbjct: 34 VSRRYKHFDWLYERLVEKYSCIAIPPLPEK----QVTGRFEEDFIEKRRERLELWMNRLA 89
Query: 70 SHPVLS---VNSHAIIFLTAK 87
HPVLS V H FLT
Sbjct: 90 RHPVLSQSEVFRH---FLTCT 107
>gnl|CDD|132771 cd06861, PX_Vps5p, The phosphoinositide binding Phox Homology
domain of yeast sorting nexin Vps5p. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. Vsp5p is the yeast counterpart
of human SNX1 and is part of the retromer complex, which
functions in the endosome-to-Golgi retrieval of vacuolar
protein sorting receptor Vps10p, the Golgi-resident
membrane protein A-ALP, and endopeptidase Kex2. The PX
domain of Vps5p binds phosphatidylinositol-3-phosphate
(PI3P). Similar to SNX1, Vps5p contains a
Bin/Amphiphysin/Rvs (BAR) domain, which detects membrane
curvature, C-terminal to the PX domain. Both domains
have been shown to determine the specific
membrane-targeting of SNX1.
Length = 112
Score = 68.1 bits (167), Expect = 2e-14
Identities = 31/86 (36%), Positives = 46/86 (53%), Gaps = 4/86 (4%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKL 60
P F + V RRY DF WL+ +L P I+PP PEK S + R+ F+ R
Sbjct: 30 PNFEVSSFSVLRRYRDFRWLYRQLQNNHPGVIVPPPPEKQS----VGRFDDNFVEQRRAA 85
Query: 61 LDQFLRRVTSHPVLSVNSHAIIFLTA 86
L++ LR++ +HPVL + +FL +
Sbjct: 86 LEKMLRKIANHPVLQKDPDFRLFLES 111
>gnl|CDD|214610 smart00312, PX, PhoX homologous domain, present in p47phox and
p40phox. Eukaryotic domain of unknown function present
in phox proteins, PLD isoforms, a PI3K isoform.
Length = 105
Score = 65.8 bits (161), Expect = 1e-13
Identities = 33/83 (39%), Positives = 50/83 (60%), Gaps = 2/83 (2%)
Query: 4 PDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQ 63
E V RRY+DF+ LH+KL + P I+PPLP K LN +S+EFI R + L++
Sbjct: 24 GLEEWTVSRRYSDFLELHSKLKKHFPRSILPPLPGKKLFGR-LNNFSEEFIEKRRRGLEK 82
Query: 64 FLRRVTSHPVLSVNSHAII-FLT 85
+L+ + +HP L +S ++ FL
Sbjct: 83 YLQSLLNHPELINHSEVVLEFLE 105
>gnl|CDD|132777 cd06867, PX_SNX41_42, The phosphoinositide binding Phox Homology
domain of fungal Sorting Nexins 41 and 42. The PX
domain is a phosphoinositide (PI) binding module present
in many proteins with diverse functions. Sorting nexins
(SNXs) make up the largest group among PX domain
containing proteins. They are involved in regulating
membrane traffic and protein sorting in the endosomal
system. The PX domain of SNXs binds PIs and targets the
protein to PI-enriched membranes. SNXs differ from each
other in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway. Some SNXs
are localized in early endosome structures such as
clathrin-coated pits, while others are located in late
structures of the endocytic pathway. SNX41 and SNX42
(also called Atg20p) form dimers with SNX4, and are
required in protein recycling from the sorting endosome
(post-Golgi endosome) back to the late Golgi in yeast.
Length = 112
Score = 64.6 bits (158), Expect = 5e-13
Identities = 29/72 (40%), Positives = 42/72 (58%), Gaps = 5/72 (6%)
Query: 9 IVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSK-----EFILCRMKLLDQ 63
V+RRY++F L L P+ IIPP+PEKHSL ++ + SK + I R ++L +
Sbjct: 29 EVKRRYSEFESLRKNLTRLYPTLIIPPIPEKHSLKDYAKKPSKAKNDAKIIERRKRMLQR 88
Query: 64 FLRRVTSHPVLS 75
FL R HP+L
Sbjct: 89 FLNRCLQHPILR 100
>gnl|CDD|132775 cd06865, PX_SNX_like, The phosphoinositide binding Phox Homology
domain of SNX-like proteins. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. Some SNXs are localized in
early endosome structures such as clathrin-coated pits,
while others are located in late structures of the
endocytic pathway. This subfamily is composed of
uncharacterized proteins, predominantly from plants,
with similarity to sorting nexins. A few members show a
similar domain architecture as a subfamily of sorting
nexins, containing a Bin/Amphiphysin/Rvs (BAR) domain,
which detects membrane curvature, C-terminal to the PX
domain. The PX-BAR structural unit is known to determine
specific membrane localization.
Length = 120
Score = 64.4 bits (157), Expect = 7e-13
Identities = 29/78 (37%), Positives = 44/78 (56%), Gaps = 3/78 (3%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRVT 69
VRRR+ D V L ++L E +PP P+K ++E S EFI R L+++L R+
Sbjct: 44 VRRRFRDVVALADRLAEAYRGAFVPPRPDKS-VVESQVMQSAEFIEQRRVALEKYLNRLA 102
Query: 70 SHPVLSVNSHAI-IFLTA 86
+HPV+ S + +FLT
Sbjct: 103 AHPVIG-LSDELRVFLTL 119
>gnl|CDD|132776 cd06866, PX_SNX8_Mvp1p_like, The phosphoinositide binding Phox
Homology domain of Sorting Nexin 8 and yeast Mvp1p. The
PX domain is a phosphoinositide (PI) binding module
present in many proteins with diverse functions. Sorting
nexins (SNXs) make up the largest group among PX domain
containing proteins. They are involved in regulating
membrane traffic and protein sorting in the endosomal
system. The PX domain of SNXs binds PIs and targets the
protein to PI-enriched membranes. SNXs differ from each
other in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway. Some SNXs
are localized in early endosome structures such as
clathrin-coated pits, while others are located in late
structures of the endocytic pathway. SNX8 and the yeast
counterpart Mvp1p are involved in sorting and delivery
of late-Golgi proteins, such as carboxypeptidase Y, to
vacuoles.
Length = 105
Score = 63.0 bits (154), Expect = 1e-12
Identities = 31/80 (38%), Positives = 42/80 (52%), Gaps = 4/80 (5%)
Query: 7 ECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLR 66
+ V RRY+DFVWLH L++ P ++P LP K +EF+ R + L +FL
Sbjct: 29 KSTVYRRYSDFVWLHEYLLKRYPYRMVPALPPKRIGGSA----DREFLEARRRGLSRFLN 84
Query: 67 RVTSHPVLSVNSHAIIFLTA 86
V HPVLS + FLT
Sbjct: 85 LVARHPVLSEDELVRTFLTE 104
>gnl|CDD|132804 cd06894, PX_SNX3_like, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 3 and related proteins. The PX
domain is a phosphoinositide (PI) binding module present
in many proteins with diverse functions. Sorting nexins
(SNXs) make up the largest group among PX domain
containing proteins. They are involved in regulating
membrane traffic and protein sorting in the endosomal
system. The PX domain of SNXs binds PIs and targets the
protein to PI-enriched membranes. SNXs differ from each
other in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway. This
subfamily is composed of SNX3, SNX12, and fungal Grd19.
Grd19 is involved in the localization of late Golgi
membrane proteins in yeast. SNX3/Grp19 associates with
the retromer complex, a membrane coat multimeric complex
required for endosomal retrieval of lysosomal hydrolase
receptors to the Golgi, and functions as a
cargo-specific adaptor for the retromer.
Length = 123
Score = 57.9 bits (140), Expect = 2e-10
Identities = 33/93 (35%), Positives = 47/93 (50%), Gaps = 8/93 (8%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHL------NRYSKEFI 54
P F E VRRRY+DF WL ++L E ++PPLP K +L L + +EFI
Sbjct: 31 PVFKKKESSVRRRYSDFEWLRSEL-ERDSKIVVPPLPGK-ALKRQLPFRGDDGIFEEEFI 88
Query: 55 LCRMKLLDQFLRRVTSHPVLSVNSHAIIFLTAK 87
R K L+ F+ +V HP+ +FL +
Sbjct: 89 EERRKGLETFINKVAGHPLAQNEKCLHMFLQEE 121
>gnl|CDD|132808 cd06898, PX_SNX10, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 10. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. Some SNXs are localized in
early endosome structures such as clathrin-coated pits,
while others are located in late structures of the
endocytic pathway. SNX10 may be involved in the
regulation of endosome homeostasis. Its expression
induces the formation of giant vacuoles in mammalian
cells.
Length = 113
Score = 55.0 bits (133), Expect = 1e-09
Identities = 29/75 (38%), Positives = 42/75 (56%), Gaps = 3/75 (4%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRVT 69
VRRRY++FVWL N+L + +P LP K +L N ++ FI R + L FL +V
Sbjct: 39 VRRRYSEFVWLRNRLQKNALLIQLPSLPPK-NLFGRFN--NEGFIEERQQGLQDFLEKVL 95
Query: 70 SHPVLSVNSHAIIFL 84
P+L +S +FL
Sbjct: 96 QTPLLLSDSRLHLFL 110
>gnl|CDD|132828 cd07295, PX_Grd19, The phosphoinositide binding Phox Homology
domain of fungal Grd19. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. Grd19 is involved in the
localization of late Golgi membrane proteins in yeast.
Grp19 associates with the retromer complex, a membrane
coat multimeric complex required for endosomal retrieval
of lysosomal hydrolase receptors to the Golgi, and
functions as a cargo-specific adaptor for the retromer.
Length = 116
Score = 54.0 bits (130), Expect = 2e-09
Identities = 31/78 (39%), Positives = 40/78 (51%), Gaps = 4/78 (5%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKL 60
P F VRRRY+DF + + L P +IPPLP K NR+S E I R +
Sbjct: 31 PAFKLRVSSVRRRYSDFEYFRDILERESPRVMIPPLPGK----IFTNRFSDEVIEERRQG 86
Query: 61 LDQFLRRVTSHPVLSVNS 78
L+ FL+ V HP+L S
Sbjct: 87 LETFLQSVAGHPLLQTGS 104
>gnl|CDD|132827 cd07294, PX_SNX12, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 12. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. Some SNXs are localized in
early endosome structures such as clathrin-coated pits,
while others are located in late structures of the
endocytic pathway. The specific function of SNX12 has
yet to be elucidated.
Length = 132
Score = 50.4 bits (120), Expect = 7e-08
Identities = 35/106 (33%), Positives = 54/106 (50%), Gaps = 12/106 (11%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHL------NRYSKEFI 54
P F E VRRRY+DF WL N+L E ++PPLP K +L L + + FI
Sbjct: 33 PIFKLKESCVRRRYSDFEWLKNEL-ERDSKIVVPPLPGK-ALKRQLPFRGDEGIFEESFI 90
Query: 55 LCRMKLLDQFLRRVTSHPVLSVNSHAIIFLTAKLAEFSMHKKHSPG 100
R + L+QF+ ++ HP L+ N + L + ++ + + PG
Sbjct: 91 EERRQGLEQFINKIAGHP-LAQNERCLHMF---LQDETIDRNYVPG 132
>gnl|CDD|132813 cd07280, PX_YPT35, The phosphoinositide binding Phox Homology
domain of the fungal protein YPT35. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions such as cell signaling,
vesicular trafficking, protein sorting, and lipid
modification, among others. This subfamily is composed
of YPT35 proteins from the fungal subkingdom Dikarya.
The PX domain is involved in targeting of proteins to
PI-enriched membranes, and may also be involved in
protein-protein interaction. The PX domain of YPT35
binds to phosphatidylinositol 3-phosphate (PI3P). It
also serves as a protein interaction domain, binding to
members of the Yip1p protein family, which localize to
the ER and Golgi. YPT35 is mainly associated with
endosomes and together with Yip1p proteins, may be
involved in a specific function in the endocytic
pathway.
Length = 120
Score = 49.6 bits (119), Expect = 9e-08
Identities = 21/73 (28%), Positives = 34/73 (46%), Gaps = 3/73 (4%)
Query: 6 TECIVRRRYNDFVWLHNKLVETLPSH---IIPPLPEKHSLLEHLNRYSKEFILCRMKLLD 62
+ + +RY++FV L L++ P H IP LP K + +K ++ R + L
Sbjct: 37 SSIVAYKRYSEFVQLREALLDEFPRHKRNEIPQLPPKVPWYDSRVNLNKAWLEKRRRGLQ 96
Query: 63 QFLRRVTSHPVLS 75
FL V +PV
Sbjct: 97 YFLNCVLLNPVFG 109
>gnl|CDD|132826 cd07293, PX_SNX3, The phosphoinositide binding Phox Homology domain
of Sorting Nexin 3. The PX domain is a phosphoinositide
(PI) binding module present in many proteins with
diverse functions. Sorting nexins (SNXs) make up the
largest group among PX domain containing proteins. They
are involved in regulating membrane traffic and protein
sorting in the endosomal system. The PX domain of SNXs
binds PIs and targets the protein to PI-enriched
membranes. SNXs differ from each other in PI-binding
specificity and affinity, and the presence of other
protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. SNX3 associates with early
endosomes through a PX domain-mediated interaction with
phosphatidylinositol-3-phosphate (PI3P). It associates
with the retromer complex, a membrane coat multimeric
complex required for endosomal retrieval of lysosomal
hydrolase receptors to the Golgi, and functions as a
cargo-specific adaptor for the retromer. SNX3 is
required for the formation of multivesicular bodies,
which function as transport intermediates to late
endosomes. It also promotes cell surface expression of
the amiloride-sensitive epithelial Na+ channel (ENaC),
which is critical in sodium homeostasis and maintenance
of extracellular fluid volume.
Length = 123
Score = 49.2 bits (117), Expect = 1e-07
Identities = 31/79 (39%), Positives = 42/79 (53%), Gaps = 8/79 (10%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHL------NRYSKEFI 54
P F E VRRRY+DF WL ++L E ++PPLP K +L L + FI
Sbjct: 31 PIFKLKESTVRRRYSDFEWLRSEL-ERESKVVVPPLPGK-ALFRQLPFRGDDGIFDDSFI 88
Query: 55 LCRMKLLDQFLRRVTSHPV 73
R + L+QFL +V HP+
Sbjct: 89 EERKQGLEQFLNKVAGHPL 107
>gnl|CDD|132819 cd07286, PX_SNX18, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 18. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system.
The PX domain of SNXs binds PIs and targets the protein
to PI-enriched membranes. SNXs differ from each other
in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway. SNX18, like
SNX9, contains an N-terminal Src Homology 3 (SH3)
domain, a PX domain, and a C-terminal
Bin/Amphiphysin/Rvs (BAR) domain, which detects
membrane curvature. The PX-BAR structural unit helps
determine specific membrane localization. SNX18 is
localized to peripheral endosomal structures, and acts
in a trafficking pathway that is clathrin-independent
but relies on AP-1 and PACS1.
Length = 127
Score = 49.3 bits (117), Expect = 2e-07
Identities = 26/70 (37%), Positives = 38/70 (54%), Gaps = 4/70 (5%)
Query: 6 TECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFL 65
T V RRY F WL+ +L E P +P +PEK + R+ ++FI R K L ++
Sbjct: 30 TGLQVHRRYKHFDWLYARLAEKFPVISVPHIPEKQA----TGRFEEDFISKRRKGLIWWM 85
Query: 66 RRVTSHPVLS 75
+ SHPVL+
Sbjct: 86 DHMCSHPVLA 95
>gnl|CDD|132807 cd06897, PX_SNARE, The phosphoinositide binding Phox Homology
domain of SNARE proteins from fungi. The PX domain is
a phosphoinositide (PI) binding module present in many
proteins with diverse functions such as cell signaling,
vesicular trafficking, protein sorting, and lipid
modification, among others. This subfamily is composed
of fungal proteins similar to Saccharomyces cerevisiae
Vam7p. They contain an N-terminal PX domain and a
C-terminal SNARE domain. The SNARE (Soluble NSF
attachment protein receptor) family of proteins are
integral membrane proteins that serve as key factors
for vesicular trafficking. Vam7p is anchored at the
vacuolar membrane through the specific interaction of
its PX domain with phosphatidylinositol-3-phosphate
(PI3P) present in bilayers. It plays an essential role
in vacuole fusion. The PX domain is involved in
targeting of proteins to PI-enriched membranes, and may
also be involved in protein-protein interaction.
Length = 108
Score = 46.5 bits (111), Expect = 1e-06
Identities = 20/71 (28%), Positives = 31/71 (43%), Gaps = 2/71 (2%)
Query: 2 EFPDTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLL 61
P V RRY++FV LH +L + PLP K L + + + + R L
Sbjct: 23 RLPLRSYTVSRRYSEFVALHKQLESEVGIEPPYPLPPKSWFLSTSS--NPKLVEERRVGL 80
Query: 62 DQFLRRVTSHP 72
+ FLR + +
Sbjct: 81 EAFLRALLNDE 91
>gnl|CDD|132818 cd07285, PX_SNX9, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 9. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system.
The PX domain of SNXs binds PIs and targets the protein
to PI-enriched membranes. SNXs differ from each other
in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway. SNX9, also
known as SH3PX1, is a cytosolic protein that interacts
with proteins associated with clathrin-coated pits such
as Cdc-42-associated tyrosine kinase 2 (ACK2). It
contains an N-terminal Src Homology 3 (SH3) domain, a
PX domain, and a C-terminal Bin/Amphiphysin/Rvs (BAR)
domain, which detects membrane curvature. The PX-BAR
structural unit helps determine specific membrane
localization. Through its SH3 domain, SNX9 binds class
I polyproline sequences found in dynamin 1/2 and the
WASP/N-WASP actin regulators. SNX9 is localized to
plasma membrane endocytic sites and acts primarily in
clathrin-mediated endocytosis. Its array of interacting
partners suggests that SNX9 functions at the interface
between endocytosis and actin cytoskeletal
organization.
Length = 126
Score = 46.2 bits (109), Expect = 2e-06
Identities = 25/67 (37%), Positives = 36/67 (53%), Gaps = 5/67 (7%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHI-IPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRV 68
V RY F WL+ +L+ I IP LP+K R+ +EFI RM+ L ++ R+
Sbjct: 34 VNHRYKHFDWLYERLLVKFGLAIPIPSLPDKQVT----GRFEEEFIKMRMERLQAWMTRM 89
Query: 69 TSHPVLS 75
HPV+S
Sbjct: 90 CRHPVIS 96
>gnl|CDD|132815 cd07282, PX_SNX2, The phosphoinositide binding Phox Homology domain
of Sorting Nexin 2. The PX domain is a phosphoinositide
(PI) binding module present in many proteins with
diverse functions. Sorting nexins (SNXs) make up the
largest group among PX domain containing proteins. They
are involved in regulating membrane traffic and protein
sorting in the endosomal system. The PX domain of SNXs
binds PIs and targets the protein to PI-enriched
membranes. SNXs differ from each other in PI-binding
specificity and affinity, and the presence of other
protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. SNX2 is a component of the
retromer complex, a membrane coat multimeric complex
required for endosomal retrieval of lysosomal hydrolase
receptors to the Golgi. The retromer consists of a
cargo-recognition subcomplex and a subcomplex formed by
a dimer of sorting nexins (SNX1 and/or SNX2), which
ensures efficient cargo sorting by facilitating proper
membrane localization of the cargo-recognition
subcomplex. Similar to SNX1, SNX2 contains a
Bin/Amphiphysin/Rvs (BAR) domain, which detects membrane
curvature, C-terminal to the PX domain. The PX domain of
SNX2 preferentially binds
phosphatidylinositol-3-phosphate (PI3P), but not
PI(3,4,5)P3. Studies on mice deficient with SNX1 and/or
SNX2 suggest that they provide an essential function in
embryogenesis and are functionally redundant.
Length = 124
Score = 45.4 bits (107), Expect = 3e-06
Identities = 28/80 (35%), Positives = 43/80 (53%), Gaps = 8/80 (10%)
Query: 3 FPDTECIVRRRYNDFVWLHNKLVETL--PSHIIPPLPEKHSL------LEHLNRYSKEFI 54
F +E VRRR++DF+ LH+KL +I+PP PEK + + + S EF+
Sbjct: 32 FSRSEFSVRRRFSDFLGLHSKLASKYLHVGYIVPPAPEKSIVGMTKVKVGKEDSSSTEFV 91
Query: 55 LCRMKLLDQFLRRVTSHPVL 74
R L+++L+R HP L
Sbjct: 92 EKRRAALERYLQRTVKHPTL 111
>gnl|CDD|132781 cd06871, PX_MONaKA, The phosphoinositide binding Phox Homology
domain of Modulator of Na,K-ATPase. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions such as cell signaling,
vesicular trafficking, protein sorting, and lipid
modification, among others. MONaKA (Modulator of
Na,K-ATPase) binds the plasma membrane ion transporter,
Na,K-ATPase, and modulates its enzymatic and ion pump
activities. It modulates brain Na,K-ATPase and may be
involved in regulating electrical excitability and
synaptic transmission. MONaKA contains an N-terminal PX
domain and a C-terminal catalytic kinase domain. The PX
domain interacts with PIs and plays a role in targeting
proteins to PI-enriched membranes.
Length = 120
Score = 44.7 bits (106), Expect = 5e-06
Identities = 25/66 (37%), Positives = 36/66 (54%), Gaps = 7/66 (10%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRVT 69
V RRYNDF L+ L S I PLP K L+ +++R EFI R + L +L +
Sbjct: 40 VIRRYNDFDLLNASL---QISGISLPLPPK-KLIGNMDR---EFIAERQQGLQNYLNVIL 92
Query: 70 SHPVLS 75
+P+L+
Sbjct: 93 MNPILA 98
>gnl|CDD|132814 cd07281, PX_SNX1, The phosphoinositide binding Phox Homology domain
of Sorting Nexin 1. The PX domain is a phosphoinositide
(PI) binding module present in many proteins with
diverse functions. Sorting nexins (SNXs) make up the
largest group among PX domain containing proteins. They
are involved in regulating membrane traffic and protein
sorting in the endosomal system. The PX domain of SNXs
binds PIs and targets the protein to PI-enriched
membranes. SNXs differ from each other in PI-binding
specificity and affinity, and the presence of other
protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. SNX1 is both membrane
associated and a cytosolic protein that exists as a
tetramer in protein complexes. It can associate
reversibly with membranes of the endosomal compartment,
thereby coating these vesicles. SNX1 is a component of
the retromer complex, a membrane coat multimeric complex
required for endosomal retrieval of lysosomal hydrolase
receptors to the Golgi. The retromer consists of a
cargo-recognition subcomplex and a subcomplex formed by
a dimer of sorting nexins (SNX1 and/or SNX2), which
ensures efficient cargo sorting by facilitating proper
membrane localization of the cargo-recognition
subcomplex. SNX1 contains a Bin/Amphiphysin/Rvs (BAR)
domain C-terminal to the PX domain. The PX domain of
SNX1 specifically binds phosphatidylinositol-3-phosphate
(PI3P) and PI(3,5)P2, while the BAR domain detects
membrane curvature. Both domains help determine the
specific membrane-targeting of SNX1, which is localized
to a microdomain in early endosomes where it regulates
cation-independent mannose-6-phosphate receptor
retrieval to the trans Golgi network.
Length = 124
Score = 43.9 bits (103), Expect = 1e-05
Identities = 27/82 (32%), Positives = 43/82 (52%), Gaps = 8/82 (9%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVE--TLPSHIIPPLPEKHSL------LEHLNRYSKE 52
F V+RR++DF+ L+ KL E + I+PP PEK + + + S E
Sbjct: 30 LMFRSKHFTVKRRFSDFLGLYEKLSEKHSQNGFIVPPPPEKSLIGMTKVKVGKEDSSSAE 89
Query: 53 FILCRMKLLDQFLRRVTSHPVL 74
F+ R L+++L+R+ SHP L
Sbjct: 90 FLERRRAALERYLQRIVSHPSL 111
>gnl|CDD|132824 cd07291, PX_SNX5, The phosphoinositide binding Phox Homology domain
of Sorting Nexin 5. The PX domain is a phosphoinositide
(PI) binding module present in many proteins with
diverse functions. Sorting nexins (SNXs) make up the
largest group among PX domain containing proteins. They
are involved in regulating membrane traffic and protein
sorting in the endosomal system. The PX domain of SNXs
binds PIs and targets the protein to PI-enriched
membranes. SNXs differ from each other in PI-binding
specificity and affinity, and the presence of other
protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. SNX5, abundantly expressed in
macrophages, regulates macropinocytosis, a process that
enables cells to internalize large amounts of external
solutes. It may also be a component of the retromer
complex, a membrane coat multimeric complex required for
endosomal retrieval of lysosomal hydrolase receptors to
the Golgi, acting as a mammalian equivalent of yeast
Vsp17p. It also binds the Fanconi anaemia
complementation group A protein (FANCA). SNX5 harbors a
Bin/Amphiphysin/Rvs (BAR) domain, which detects membrane
curvature, C-terminal to the PX domain, similar to other
sorting nexins including SNX1-2. The PX-BAR structural
unit helps determine the specific membrane-targeting of
some SNXs. The PX domain of SNX5 binds
phosphatidylinositol-3-phosphate (PI3P) and PI(3,4)P2.
SNX5 is localized to a subdomain of early endosome and
is recruited to the plasma membrane following EGF
stimulation and elevation of PI(3,4)P2 levels.
Length = 141
Score = 43.5 bits (102), Expect = 3e-05
Identities = 35/111 (31%), Positives = 50/111 (45%), Gaps = 27/111 (24%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVET--LPSHIIPPLPEK----------HSLLEHLNR 48
P F + V R++ DF+WLH+ L+ET IIPP P K L E
Sbjct: 28 PSFQSPDFSVTRQHEDFIWLHDALIETEDYAGLIIPPAPPKPDFDGPREKMQKLGEGEGS 87
Query: 49 YSK-EFILCRMKLLDQ--------------FLRRVTSHPVLSVNSHAIIFL 84
+K EF + +L + FL+R++SHP LS + + IFL
Sbjct: 88 MTKEEFAKMKQELEAEYLAVFKKTVQVHEVFLQRLSSHPSLSKDRNFHIFL 138
>gnl|CDD|132802 cd06892, PX_SNX5_like, The phosphoinositide binding Phox Homology
domain of Sorting Nexins 5 and 6. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. Members of this subfamily
include SNX5, SNX6, and similar proteins. They contain a
Bin/Amphiphysin/Rvs (BAR) domain, which detects membrane
curvature, C-terminal to the PX domain, similar to other
sorting nexins including SNX1-2. The PX-BAR structural
unit helps determine the specific membrane-targeting of
some SNXs. SNX5 and SNX6 may be components of the
retromer complex, a membrane coat multimeric complex
required for endosomal retrieval of lysosomal hydrolase
receptors to the Golgi, acting as a mammalian equivalent
of yeast Vsp17p.
Length = 141
Score = 41.7 bits (98), Expect = 8e-05
Identities = 36/112 (32%), Positives = 49/112 (43%), Gaps = 29/112 (25%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVET--LPSHIIPPLPEK----------HSLLEHLNR 48
P F E V R++ +FVWLH+ LVE IIPP P K L E
Sbjct: 28 PTFQKPEFSVTRQHEEFVWLHDTLVENEDYAGLIIPPAPPKPDFDASREKLQKLGEGEGS 87
Query: 49 YSKEFILCRMK----------------LLDQFLRRVTSHPVLSVNSHAIIFL 84
+KE +MK + + FLRR+ SHPVL +++ +FL
Sbjct: 88 MTKEEFE-KMKQELEAEYLAIFKKTVAMHEVFLRRLASHPVLRNDANFRVFL 138
>gnl|CDD|132783 cd06873, PX_SNX13, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 13. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. SNX13, also called RGS-PX1,
contains an N-terminal PXA domain, a regulator of G
protein signaling (RGS) domain, a PX domain, and a
C-terminal domain that is conserved in some SNXs. It
specifically binds to the stimulatory subunit of the
heterotrimeric G protein G(alpha)s, serving as its
GTPase activating protein, through the RGS domain. It
preferentially binds phosphatidylinositol-3-phosphate
(PI3P) through the PX domain and is localized in early
endosomes. SNX13 is involved in endosomal sorting of
EGFR into multivesicular bodies (MVB) for delivery to
the lysosome.
Length = 120
Score = 39.9 bits (94), Expect = 2e-04
Identities = 23/68 (33%), Positives = 35/68 (51%), Gaps = 4/68 (5%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRVT 69
V RRY+DF LH +L E P+ P K + N + F+ R K+L+Q+L+ +
Sbjct: 43 VYRRYSDFHDLHMRLKEKFPNLSKLSFPGKKT----FNNLDRAFLEKRRKMLNQYLQSLL 98
Query: 70 SHPVLSVN 77
+ VL N
Sbjct: 99 NPEVLDAN 106
>gnl|CDD|153306 cd07622, BAR_SNX4, The Bin/Amphiphysin/Rvs (BAR) domain of Sorting
Nexin 4. BAR domains are dimerization, lipid binding
and curvature sensing modules found in many different
proteins with diverse functions. Sorting nexins (SNXs)
are Phox homology (PX) domain containing proteins that
are involved in regulating membrane traffic and protein
sorting in the endosomal system. SNXs differ from each
other in their lipid-binding specificity, subcellular
localization and specific function in the endocytic
pathway. A subset of SNXs also contain BAR domains. The
PX-BAR structural unit determines the specific membrane
targeting of SNXs. SNX4 is involved in recycling traffic
from the sorting endosome (post-Golgi endosome) back to
the late Golgi. It is also implicated in the regulation
of plasma membrane receptor trafficking and interacts
with receptors for EGF, insulin, platelet-derived growth
factor and leptin. BAR domains form dimers that bind to
membranes, induce membrane bending and curvature, and
may also be involved in protein-protein interactions.
Length = 201
Score = 40.8 bits (96), Expect = 4e-04
Identities = 30/138 (21%), Positives = 64/138 (46%), Gaps = 4/138 (2%)
Query: 118 TMSLRHHHSEFEQFSQYISNLYEKISAFEKIGTRLYKERKDYVSEAH-QFAIVLNTWAGY 176
+ LR+ FE Y L ++ K+ RL ER V + H + V + W+
Sbjct: 6 SFRLRNPDKRFEDLKNYSDELQTNLNNLLKVRARL-AERLYGVYKIHANYGRVFSEWSAI 64
Query: 177 EPQLSSVIRQVSKAVDTTASLHKNLLIEPFHEHNSHPMKDYLMYIDAVKQVLARRDVIQA 236
E ++ +++ +D+ A+ N L + E + +K+YL + D+++ V + +++Q
Sbjct: 65 EKEMGDGLQKAGHYMDSYAASIDNGLED--EELIADQLKEYLFFADSLRAVCKKHELLQY 122
Query: 237 EHDMCGEELQKKTAEKEQ 254
+ + + L K + E+
Sbjct: 123 DLEKAEDALANKKQQGEE 140
>gnl|CDD|132779 cd06869, PX_UP2_fungi, The phosphoinositide binding Phox Homology
domain of uncharacterized fungal proteins. The PX
domain is a phosphoinositide (PI) binding module
involved in targeting proteins to PI-enriched membranes.
Members in this subfamily are uncharacterized fungal
proteins containing a PX domain. PX domain harboring
proteins have been implicated in highly diverse
functions such as cell signaling, vesicular trafficking,
protein sorting, lipid modification, cell polarity and
division, activation of T and B cells, and cell
survival. In addition to protein-lipid interaction, the
PX domain may also be involved in protein-protein
interaction.
Length = 119
Score = 39.2 bits (92), Expect = 5e-04
Identities = 22/63 (34%), Positives = 28/63 (44%), Gaps = 10/63 (15%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRVT 69
V RRY+DF LH+ L + P +P LP K L R S L Q+LR +
Sbjct: 52 VARRYSDFKKLHHDLKKEFPGKKLPKLPHKDKLPREKLRLS----------LRQYLRSLL 101
Query: 70 SHP 72
P
Sbjct: 102 KDP 104
>gnl|CDD|132787 cd06877, PX_SNX14, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 14. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. SNX14 may be involved in
recruiting other proteins to the membrane via
protein-protein and protein-ligand interaction. It is
expressed in the embryonic nervous system of mice, and
is co-expressed in the motoneurons and the anterior
pituary with Islet-1. SNX14 shows a similar domain
architecture as SNX13, containing an N-terminal PXA
domain, a regulator of G protein signaling (RGS) domain,
a PX domain, and a C-terminal domain that is conserved
in some SNXs.
Length = 119
Score = 38.9 bits (91), Expect = 5e-04
Identities = 20/67 (29%), Positives = 32/67 (47%), Gaps = 4/67 (5%)
Query: 9 IVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRV 68
V RRYN+F L +KL E PLP + S EF+ + ++ ++FL+++
Sbjct: 45 SVLRRYNEFYVLESKLTEFHGEFPDAPLPSRRI----FGPKSYEFLESKREIFEEFLQKL 100
Query: 69 TSHPVLS 75
P L
Sbjct: 101 LQKPELR 107
>gnl|CDD|132809 cd07276, PX_SNX16, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 16. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system.
The PX domain of SNXs binds PIs and targets the protein
to PI-enriched membranes. SNXs differ from each other
in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway. SNX16
contains a central PX domain followed by a coiled-coil
region. SNX16 is localized in early and recycling
endosomes through the binding of its PX domain to
phosphatidylinositol-3-phosphate (PI3P). It plays a
role in epidermal growth factor (EGF) signaling by
regulating EGF receptor membrane trafficking.
Length = 110
Score = 38.2 bits (89), Expect = 0.001
Identities = 19/67 (28%), Positives = 31/67 (46%), Gaps = 4/67 (5%)
Query: 9 IVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRV 68
V RRY DFV L++KL + P LP K + + +F+ R L F+ +
Sbjct: 36 FVFRRYTDFVRLNDKLKQMFP-GFRLSLPPKRWF---KDNFDPDFLEERQLGLQAFVNNI 91
Query: 69 TSHPVLS 75
+H ++
Sbjct: 92 MAHKDIA 98
>gnl|CDD|132778 cd06868, PX_HS1BP3, The phosphoinositide binding Phox Homology
domain of HS1BP3. The PX domain is a phosphoinositide
(PI) binding module present in many proteins with
diverse functions such as cell signaling, vesicular
trafficking, protein sorting, and lipid modification,
among others. Hematopoietic lineage cell-specific
protein-1 (HS1) binding protein 3 (HS1BP3) associates
with HS1 proteins through their SH3 domains, suggesting
a role in mediating signaling. It has been reported that
HS1BP3 might affect the IL-2 signaling pathway in
hematopoietic lineage cells. Mutations in HS1BP3 may
also be associated with familial Parkinson disease and
essential tremor. HS1BP3 contains a PX domain, a leucine
zipper, motifs similar to immunoreceptor tyrosine-based
inhibitory motif and proline-rich regions. The PX domain
interacts with PIs and plays a role in targeting
proteins to PI-enriched membranes.
Length = 120
Score = 37.0 bits (86), Expect = 0.003
Identities = 23/79 (29%), Positives = 38/79 (48%), Gaps = 6/79 (7%)
Query: 9 IVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRV 68
+V ++Y++F L+ KL E P I+PPLP K + S+ I R + F+R +
Sbjct: 48 MVSKKYSEFEELYKKLSEKYPGTILPPLPRKALFV------SESDIRERRAAFNDFMRFI 101
Query: 69 TSHPVLSVNSHAIIFLTAK 87
+ L+ + FL K
Sbjct: 102 SKDEKLANCPELLEFLGVK 120
>gnl|CDD|132803 cd06893, PX_SNX19, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 19. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. SNX19 contains an N-terminal
PXA domain, a central PX domain, and a C-terminal domain
that is conserved in some SNXs. These domains are also
found in SNX13 and SNX14, which also contain a regulator
of G protein signaling (RGS) domain in between the PXA
and PX domains. SNX19 interacts with IA-2, a major
autoantigen found in type-1 diabetes. It inhibits the
conversion of phosphatidylinositol-4,5-bisphosphate
[PI(4,5)P2] to PI(3,4,5)P3, which leads in the decrease
of protein phosphorylation in the Akt signaling pathway,
resulting in apoptosis. SNX19 may also be implicated in
coronary heart disease and thyroid oncocytic tumors.
Length = 132
Score = 37.1 bits (86), Expect = 0.003
Identities = 23/85 (27%), Positives = 33/85 (38%), Gaps = 18/85 (21%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVETL----------PSHIIPPLPEKHSLLEHLNRYS 50
E P V RR+ +F+ L +L E P + LP
Sbjct: 44 SEQPLATHTVNRRFREFLTLQTRLEENPKFRKIMNVKGPPKRLFDLP--------FGNMD 95
Query: 51 KEFILCRMKLLDQFLRRVTSHPVLS 75
K+ I R LL+ FLR++ S P +S
Sbjct: 96 KDKIEARRGLLETFLRQLCSIPEIS 120
>gnl|CDD|132780 cd06870, PX_CISK, The phosphoinositide binding Phox Homology Domain
of Cytokine-Independent Survival Kinase. The PX domain
is a phosphoinositide (PI) binding module present in
many proteins with diverse functions.
Cytokine-independent survival kinase (CISK), also called
Serum- and Glucocorticoid-induced Kinase 3 (SGK3), plays
a role in cell growth and survival. It is expressed in
most tissues and is most abundant in the embryo and
adult heart and spleen. It was originally discovered in
a screen for antiapoptotic genes. It phosphorylates and
inhibits the proapoptotic proteins, Bad and FKHRL1.
CISK/SGK3 also regulates many transporters, ion
channels, and receptors. It plays a critical role in
hair follicle morphogenesis and hair cycling. N-terminal
to a catalytic kinase domain, CISK contains a PX domain
which binds highly phosphorylated PIs, directs membrane
localization, and regulates the enzyme's activity.
Length = 109
Score = 36.2 bits (84), Expect = 0.005
Identities = 24/78 (30%), Positives = 37/78 (47%), Gaps = 6/78 (7%)
Query: 10 VRRRYNDFVWLHNKLVETLP-SHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRV 68
V RRY +F L+ L + P S++ +P K N + +FI R LD+F++R+
Sbjct: 36 VFRRYAEFDKLYESLKKQFPASNL--KIPGKRLFG---NNFDPDFIKQRRAGLDEFIQRL 90
Query: 69 TSHPVLSVNSHAIIFLTA 86
S P L + FL
Sbjct: 91 VSDPKLLNHPDVRAFLQM 108
>gnl|CDD|220180 pfam09325, Vps5, Vps5 C terminal like. Vps5 is a sorting nexin
that functions in membrane trafficking. This is the C
terminal dimerisation domain.
Length = 236
Score = 37.3 bits (87), Expect = 0.007
Identities = 45/222 (20%), Positives = 86/222 (38%), Gaps = 31/222 (13%)
Query: 127 EFEQFSQYISNLYEKISAFEKIGTRLYKERKDYVSEAHQFAIVLNTWAGYE--PQLSSVI 184
FE QYI +L ++ K L +RK+ S +FA L A E LS +
Sbjct: 25 WFEDKRQYIDSLESQLKKLYKALELLVNQRKELASATGEFAKSLAMLASLELSTGLSRAL 84
Query: 185 RQVSKAVDTTASLHKNL-LIEPFHEHNSHPMKDYLMYIDAVKQVL-ARRDVIQAEHDMCG 242
Q+++ + L + L + + +YL I +VK V R Q +
Sbjct: 85 SQLAEVEERIKELLERQALQDVLTL--GETIDEYLRLIGSVKAVFNQRVKAWQQWQN-AE 141
Query: 243 EELQKKTAEKEQLTNKDSDSSSPTSSTATSSTNSYSLWKSTSE-DRLEKLSTAIPKLTSQ 301
++L KK A+ +L S D+L++ + + +
Sbjct: 142 QDLSKKRAQLAKLK-----------------------GAGKSRQDKLQQAKKEVDEAERK 178
Query: 302 LEICDEKLQTANNHLRSDLERWRLEKKNDLKKILLKIADQQI 343
++ ++ + + ++ +LER+ E+ +D K +L + I
Sbjct: 179 VQQAKKEFEDISETIKKELERFETERVDDFKNVLEIYLESAI 220
>gnl|CDD|132825 cd07292, PX_SNX6, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 6. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system.
The PX domain of SNXs binds PIs and targets the protein
to PI-enriched membranes. SNXs differ from each other
in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway. SNX6 forms
a stable complex with SNX1 and may be a component of
the retromer complex, a membrane coat multimeric
complex required for endosomal retrieval of lysosomal
hydrolase receptors to the Golgi, acting as a mammalian
equivalent of yeast Vsp17p. It interacts with the
receptor serine/threonine kinases from the transforming
growth factor-beta family. It also plays roles in
enhancing the degradation of EGFR and in regulating the
activity of Na,K-ATPase through its interaction with
Translationally Controlled Tumor Protein (TCTP). SNX6
harbors a Bin/Amphiphysin/Rvs (BAR) domain, which
detects membrane curvature, C-terminal to the PX
domain, similar to other sorting nexins including
SNX1-2. The PX-BAR structural unit helps determine the
specific membrane-targeting of some SNXs.
Length = 141
Score = 34.7 bits (79), Expect = 0.021
Identities = 16/41 (39%), Positives = 23/41 (56%), Gaps = 2/41 (4%)
Query: 1 PEFPDTECIVRRRYNDFVWLHNKLVET--LPSHIIPPLPEK 39
P F E V R++ +F+WLH+ VE +IIPP P +
Sbjct: 28 PNFKQNEFSVVRQHEEFIWLHDSFVENEDYAGYIIPPAPPR 68
>gnl|CDD|132789 cd06879, PX_UP1_plant, The phosphoinositide binding Phox Homology
domain of uncharacterized plant proteins. The PX
domain is a phosphoinositide (PI) binding module
involved in targeting proteins to PI-enriched
membranes. Members in this subfamily are
uncharacterized fungal proteins containing a PX domain.
PX domain harboring proteins have been implicated in
highly diverse functions such as cell signaling,
vesicular trafficking, protein sorting, lipid
modification, cell polarity and division, activation of
T and B cells, and cell survival. In addition to
protein-lipid interaction, the PX domain may also be
involved in protein-protein interaction.
Length = 138
Score = 34.6 bits (79), Expect = 0.022
Identities = 14/33 (42%), Positives = 18/33 (54%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSL 42
V RR+NDF+ LH L + P +P P K L
Sbjct: 65 VLRRFNDFLKLHTDLKKLFPKKKLPAAPPKGLL 97
>gnl|CDD|132798 cd06888, PX_FISH, The phosphoinositide binding Phox Homology
domain of Five SH protein. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions such as cell signaling,
vesicular trafficking, protein sorting, and lipid
modification, among others. Five SH (FISH), also called
Tks5, is a scaffolding protein and Src substrate that
is localized in podosomes, which are electron-dense
structures found in Src-transformed fibroblasts,
osteoclasts, macrophages, and some invasive cancer
cells. FISH contains an N-terminal PX domain and five
Src homology 3 (SH3) domains. FISH binds and regulates
some members of the ADAMs family of transmembrane
metalloproteases, which function as sheddases and
mediators of cell and matrix interactions. It is
required for podosome formation, degradation of the
extracellular matrix, and cancer cell invasion. This
subfamily also includes proteins with a different
number of SH3 domains than FISH, such as Tks4, which
contains four SH3 domains instead of five. The Tks4
adaptor protein is required for the formation of
functional podosomes. It has overlapping, but not
identical, functions as FISH. The PX domain is involved
in targeting of proteins to PI-enriched membranes, and
may also be involved in protein-protein interaction.
Length = 119
Score = 33.6 bits (77), Expect = 0.043
Identities = 13/43 (30%), Positives = 20/43 (46%), Gaps = 9/43 (20%)
Query: 6 TECIVRRRYNDFVWLHNKLVETLP---------SHIIPPLPEK 39
+ ++ RRY+ F L +L++ P IIP LP K
Sbjct: 31 SSNVIYRRYSKFFDLQMQLLDKFPIEGGQKDPSQRIIPFLPGK 73
>gnl|CDD|115579 pfam06933, SSP160, Special lobe-specific silk protein SSP160. This
family consists of several special lobe-specific silk
protein SSP160 sequences which appear to be specific to
Chironomus (Midge) species.
Length = 758
Score = 34.7 bits (79), Expect = 0.077
Identities = 19/68 (27%), Positives = 33/68 (48%), Gaps = 1/68 (1%)
Query: 243 EELQKKTAEKEQLTNKDSDSSSPTSSTATSSTNSYSLWKSTSEDRLEKLSTAIPKLTSQL 302
E +A +N +S S+S T+S +T++TNS + STS ++ I + +
Sbjct: 274 EAFANGSASANSTSNSNSTSNSTTNSNSTTTTNSTTSTNSTSSSNSSTIAGCI-DIAANF 332
Query: 303 EICDEKLQ 310
I + LQ
Sbjct: 333 TIALQNLQ 340
>gnl|CDD|132800 cd06890, PX_Bem1p, The phosphoinositide binding Phox Homology
domain of Bem1p. The PX domain is a phosphoinositide
(PI) binding module present in many proteins with
diverse functions such as cell signaling, vesicular
trafficking, protein sorting, and lipid modification,
among others. Members of this subfamily bear similarity
to Saccharomyces cerevisiae Bem1p, containing two Src
Homology 3 (SH3) domains at the N-terminus, a central
PX domain, and a C-terminal PB1 domain. Bem1p is a
scaffolding protein that is critical for proper Cdc42p
activation during bud formation in yeast. During
budding and mating, Bem1p migrates to the plasma
membrane where it can serve as an adaptor for Cdc42p
and some other proteins. Bem1p also functions as an
effector of the G1 cyclin Cln3p and the
cyclin-dependent kinase Cdc28p in promoting vacuolar
fusion. The PX domain is involved in targeting of
proteins to PI-enriched membranes, and may also be
involved in protein-protein interaction. The PX domain
of Bem1p specifically binds
phosphatidylinositol-4-phosphate (PI4P).
Length = 112
Score = 32.3 bits (74), Expect = 0.11
Identities = 18/64 (28%), Positives = 23/64 (35%), Gaps = 18/64 (28%)
Query: 9 IVRRRYNDFVWLHNKLVETLPSH--------IIPPLPE----------KHSLLEHLNRYS 50
+ R Y DF LH L++ P+ I+P LP L LN Y
Sbjct: 30 YLCRYYQDFYKLHIALLDLFPAEAGRNSSKRILPYLPGPVTDVVNDSISLKRLNDLNEYL 89
Query: 51 KEFI 54
E I
Sbjct: 90 NELI 93
>gnl|CDD|132785 cd06875, PX_IRAS, The phosphoinositide binding Phox Homology
domain of the Imidazoline Receptor Antisera-Selected.
The PX domain is a phosphoinositide binding (PI) module
present in many proteins with diverse functions such as
cell signaling, vesicular trafficking, protein sorting,
and lipid modification, among others. Imidazoline
Receptor Antisera-Selected (IRAS), also called
nischarin, contains an N-terminal PX domain, leucine
rich repeats, and a predicted coiled coil domain. The
PX domain of IRAS binds to
phosphatidylinositol-3-phosphate in membranes. Together
with the coiled coil domain, it is essential for the
localization of IRAS to endosomes. IRAS has been shown
to interact with integrin and inhibit cell migration.
Its interaction with alpha5 integrin causes a
redistribution of the receptor from the cell surface to
endosomal structures, suggesting that IRAS may function
as a sorting nexin (SNX) which regulates the endosomal
trafficking of integrin. SNXs make up the largest group
among PX domain containing proteins. They are involved
in regulating membrane traffic and protein sorting in
the endosomal system. SNXs differ from each other in
PI-binding specificity and affinity, and the presence
of other protein-protein interaction domains, which
help determine subcellular localization and specific
function in the endocytic pathway.
Length = 116
Score = 31.1 bits (71), Expect = 0.30
Identities = 10/16 (62%), Positives = 13/16 (81%)
Query: 10 VRRRYNDFVWLHNKLV 25
V+ RY+DF LH+KLV
Sbjct: 33 VKHRYSDFAELHDKLV 48
>gnl|CDD|132786 cd06876, PX_MDM1p, The phosphoinositide binding Phox Homology
domain of yeast MDM1p. The PX domain is a
phosphoinositide binding (PI) module present in many
proteins with diverse functions such as cell signaling,
vesicular trafficking, protein sorting, and lipid
modification, among others. Yeast MDM1p is a
filament-like protein localized in punctate structures
distributed throughout the cytoplasm. It plays an
important role in nuclear and mitochondrial transmission
to daughter buds. Members of this subfamily show similar
domain architectures as some sorting nexins (SNXs). Some
members are similar to SNX19 in that they contain an
N-terminal PXA domain, a central PX domain, and a
C-terminal domain that is conserved in some SNXs. Others
are similar to SNX13 and SNX14, which also harbor these
three domains as well as a regulator of G protein
signaling (RGS) domain in between the PXA and PX
domains. SNXs make up the largest group among PX domain
containing proteins. They are involved in regulating
membrane traffic and protein sorting in the endosomal
system. The PX domain of SNXs binds PIs and targets the
protein to PI-enriched membranes. SNXs differ from each
other in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway.
Length = 133
Score = 31.1 bits (71), Expect = 0.36
Identities = 16/58 (27%), Positives = 28/58 (48%), Gaps = 2/58 (3%)
Query: 9 IVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLR 66
+V RRY++F+ LH L + P + P+K L + R K L+++L+
Sbjct: 58 VVARRYSEFLELHKYLKKRYPGVLKLDFPQK--RKISLKYSKTLLVEERRKALEKYLQ 113
>gnl|CDD|153311 cd07627, BAR_Vps5p, The Bin/Amphiphysin/Rvs (BAR) domain of yeast
Sorting Nexin Vps5p. BAR domains are dimerization,
lipid binding and curvature sensing modules found in
many different proteins with diverse functions. Sorting
nexins (SNXs) are Phox homology (PX) domain containing
proteins that are involved in regulating membrane
traffic and protein sorting in the endosomal system.
SNXs differ from each other in their lipid-binding
specificity, subcellular localization and specific
function in the endocytic pathway. A subset of SNXs also
contain BAR domains. The PX-BAR structural unit
determines the specific membrane targeting of SNXs.
Vsp5p is the yeast counterpart of human SNX1 and is part
of the retromer complex, which functions in the
endosome-to-Golgi retrieval of vacuolar protein sorting
receptor Vps10p, the Golgi-resident membrane protein
A-ALP, and endopeptidase Kex2. BAR domains form dimers
that bind to membranes, induce membrane bending and
curvature, and may also be involved in protein-protein
interactions.
Length = 216
Score = 30.7 bits (70), Expect = 0.85
Identities = 31/186 (16%), Positives = 68/186 (36%), Gaps = 33/186 (17%)
Query: 154 KERKDYVSEAHQFAIVLNTWAGYEPQLSSVIRQVSKAVDTTASLHKNL--LIEPFHEHNS 211
+RK+ S +FA L + + + +S + A + K + +E +
Sbjct: 32 SQRKELASATEEFAETLEALSS-----LELSKSLSDLLAALAEVQKRIKESLERQALQDV 86
Query: 212 HPM----KDYLMYIDAVKQVLARRDVIQAEHDMCGEELQKKTAEKEQLTNKDSDSSSPTS 267
+ +Y+ I +V+ A+R + EL KK A+ E+L
Sbjct: 87 LTLGVTLDEYIRSIGSVRAAFAQRQKLWQYWQSAESELSKKKAQLEKLK----------- 135
Query: 268 STATSSTNSYSLWKSTSEDRLEKLSTAIPKLTSQLEICDEKLQTANNHLRSDLERWRLEK 327
T ++L L + + + + ++ + + ++S+LER+ E+
Sbjct: 136 --RQGKTQQ---------EKLNSLLSELEEAERRASELKKEFEEVSELIKSELERFERER 184
Query: 328 KNDLKK 333
D +
Sbjct: 185 VEDFRN 190
>gnl|CDD|132799 cd06889, PX_NoxO1, The phosphoinositide binding Phox Homology
domain of Nox Organizing protein 1. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions such as cell signaling,
vesicular trafficking, protein sorting, and lipid
modification, among others. Nox Organizing protein 1
(NoxO1) is a critical regulator of enzyme kinetics of
the nonphagocytic NADPH oxidase Nox1, which catalyzes
the transfer of electrons from NADPH to molecular oxygen
to form superoxide. Nox1 is expressed in colon, stomach,
uterus, prostate, and vascular smooth muscle cells.
NoxO1, a homolog of the p47phox subunit of phagocytic
NADPH oxidase, is involved in targeting activator
subunits (such as NoxA1) to Nox1. It is co-localized
with Nox1 in the membranes of resting cells and directs
the subcellular localization of Nox1. The PX domain is
involved in targeting of proteins to PI-enriched
membranes, and may also be involved in protein-protein
interaction. The PX domain of NoxO1 preferentially binds
phosphatidylinositol-3,5-bisphosphate [PI(3,5)P2], PI5P,
and PI4P.
Length = 121
Score = 29.7 bits (67), Expect = 1.0
Identities = 18/70 (25%), Positives = 28/70 (40%), Gaps = 11/70 (15%)
Query: 7 ECIVRRRYNDFVWLHNKLVETLP---------SHIIPPLPEKHSLLEHLNRYSKEFILCR 57
E V R +F LH +L E P ++P + SL S+ L R
Sbjct: 33 ELFVYRSLEEFRKLHKQLKEKFPVEAGLLRSSDRVLPKFKDAPSLGSLKGSTSRS--LAR 90
Query: 58 MKLLDQFLRR 67
+KLL+ + +
Sbjct: 91 LKLLETYCQE 100
>gnl|CDD|220623 pfam10186, Atg14, UV radiation resistance protein and
autophagy-related subunit 14. The Atg14 or Apg14
proteins are hydrophilic proteins with a predicted
molecular mass of 40.5 kDa, and have a coiled-coil motif
at the N terminus region. Yeast cells with mutant Atg14
are defective not only in autophagy but also in sorting
of carboxypeptidase Y (CPY), a vacuolar-soluble
hydrolase, to the vacuole. Subcellular fractionation
indicate that Apg14p and Apg6p are peripherally
associated with a membrane structure(s). Apg14p was
co-immunoprecipitated with Apg6p, suggesting that they
form a stable protein complex. These results imply that
Apg6/Vps30p has two distinct functions: in the
autophagic process and in the vacuolar protein sorting
pathway. Apg14p may be a component specifically required
for the function of Apg6/Vps30p through the autophagic
pathway. There are 17 auto-phagosomal component proteins
which are categorized into six functional units, one of
which is the AS-PI3K complex (Vps30/Atg6 and Atg14). The
AS-PI3K complex and the Atg2-Atg18 complex are essential
for nucleation, and the specific function of the AS-PI3K
apparently is to produce phosphatidylinositol
3-phosphate (PtdIns(3)P) at the pre-autophagosomal
structure (PAS). The localisation of this complex at the
PAS is controlled by Atg14. Autophagy mediates the
cellular response to nutrient deprivation, protein
aggregation, and pathogen invasion in humans, and
malfunction of autophagy has been implicated in multiple
human diseases including cancer. This effect seems to be
mediated through direct interaction of the human Atg14
with Beclin 1 in the human phosphatidylinositol 3-kinase
class III complex.
Length = 307
Score = 30.8 bits (70), Expect = 1.1
Identities = 20/100 (20%), Positives = 42/100 (42%), Gaps = 4/100 (4%)
Query: 243 EELQKKTAEKEQLTNKDSDS-SSPTSSTATSSTNSYSLWKSTSEDRLEKLSTAIPKLTSQ 301
+L + E E+L K ++ T+ + + L + ++RL ++ I +L +
Sbjct: 27 LDLARLLLENEELKQKVEEALEGATNEDGKLAADLLKLEVARKKERLNQIRARISQLKEE 86
Query: 302 LEICDEKLQT---ANNHLRSDLERWRLEKKNDLKKILLKI 338
+E E+++ A RSDL + + L K+
Sbjct: 87 IEQKRERIEELKRALAQRRSDLSSASYQLEKRRASQLEKL 126
>gnl|CDD|153348 cd07664, BAR_SNX2, The Bin/Amphiphysin/Rvs (BAR) domain of Sorting
Nexin 2. BAR domains are dimerization, lipid binding
and curvature sensing modules found in many different
proteins with diverse functions. Sorting nexins (SNXs)
are Phox homology (PX) domain containing proteins that
are involved in regulating membrane traffic and protein
sorting in the endosomal system. SNXs differ from each
other in their lipid-binding specificity, subcellular
localization and specific function in the endocytic
pathway. A subset of SNXs also contain BAR domains. The
PX-BAR structural unit determines the specific membrane
targeting of SNXs. SNX2 is a component of the retromer
complex, a membrane coat multimeric complex required for
endosomal retrieval of lysosomal hydrolase receptors to
the Golgi. The retromer consists of a cargo-recognition
subcomplex and a subcomplex formed by a dimer of sorting
nexins (SNX1 and/or SNX2), which ensures effcient cargo
sorting by facilitating proper membrane localization of
the cargo-recognition subcomplex. BAR domains form
dimers that bind to membranes, induce membrane bending
and curvature, and may also be involved in
protein-protein interactions.
Length = 234
Score = 30.4 bits (68), Expect = 1.2
Identities = 46/235 (19%), Positives = 88/235 (37%), Gaps = 31/235 (13%)
Query: 118 TMSLRHHHSEFEQFSQYISNLYEKISAFEKIGTRLYKERKDYVSEAHQFAIVLNTWAGYE 177
T+ + + FE+ Q NL +++ L RK+ + FA E
Sbjct: 14 TIKMNESDAWFEEKQQQFENLDQQLRKLHASVESLVCHRKELSANTAAFAKSAAMLGNSE 73
Query: 178 PQ--LSSVIRQVSKAVDTTASLHKNLLIEPFHEHNSHPMKDYLMYIDAVKQVLARRDVIQ 235
LS + Q+++ + LH++ F+ S + DY+ I AVK V +R
Sbjct: 74 DHTALSRALSQLAEVEEKIDQLHQDQAFADFYLF-SELLGDYIRLIAAVKGVFDQRMKCW 132
Query: 236 AEHDMCGEELQKK--TAEKEQLTNKDSDSSSPTSSTATSSTNSYSLWKSTSEDRLEKLST 293
+ LQKK K Q NK D+L++
Sbjct: 133 QKWQDAQVTLQKKREAEAKLQYANK--------------------------PDKLQQAKD 166
Query: 294 AIPKLTSQLEICDEKLQTANNHLRSDLERWRLEKKNDLKKILLKIADQQIAYYQQ 348
I + ++++ + + + +R ++ R+ E+ D K +++K + + QQ
Sbjct: 167 EIKEWEAKVQQGERDFEQISKTIRKEVGRFEKERVKDFKTVIIKYLESLVQTQQQ 221
>gnl|CDD|232901 TIGR00275, TIGR00275, flavoprotein, HI0933 family. The model when
searched with a partial length search brings in proteins
with a dinucleotide-binding motif (Rossman fold) over
the initial 40 residues of the model, including
oxidoreductases and dehydrogenases. Partially
characterized members include an FAD-binding protein
from Bacillus cereus and flavoprotein HI0933 from
Haemophilus influenzae [Unknown function, Enzymes of
unknown specificity].
Length = 400
Score = 30.3 bits (69), Expect = 1.6
Identities = 14/58 (24%), Positives = 19/58 (32%), Gaps = 13/58 (22%)
Query: 111 NLTNIYTTMSLRHHHSE--------FEQFSQYISNLYEKISAFEKIGTRLYKERKDYV 160
NLTN T ++ +FS + I FE +G L E V
Sbjct: 45 NLTNSCPTPEFVAYYPRNGKFLRSALSRFSN-----KDLIDFFESLGLELKVEEDGRV 97
>gnl|CDD|153312 cd07628, BAR_Atg24p, The Bin/Amphiphysin/Rvs (BAR) domain of yeast
Sorting Nexin Atg24p. BAR domains are dimerization,
lipid binding and curvature sensing modules found in
many different proteins with diverse functions. Sorting
nexins (SNXs) are Phox homology (PX) domain containing
proteins that are involved in regulating membrane
traffic and protein sorting in the endosomal system.
SNXs differ from each other in their lipid-binding
specificity, subcellular localization and specific
function in the endocytic pathway. A subset of SNXs also
contain BAR domains. The PX-BAR structural unit
determines the specific membrane targeting of SNXs.
Atg24p is involved in membrane fusion events at the
vacuolar surface during pexophagy. BAR domains form
dimers that bind to membranes, induce membrane bending
and curvature, and may also be involved in
protein-protein interactions.
Length = 185
Score = 29.5 bits (67), Expect = 1.7
Identities = 26/137 (18%), Positives = 52/137 (37%), Gaps = 12/137 (8%)
Query: 127 EFEQFSQYISNLYEKISAFEKIGTRLYKERKDYVSEAHQFA------IVLNTWAGYEPQL 180
EF + + L E ++ +KI ++ K + D + A L +
Sbjct: 5 EFLEIREKSDKLDENLTKIDKIFAKVVKRQSDLSVDYADLATQFQKLGSLES-GEITEPF 63
Query: 181 SSVIRQVSKAVDTTASLHKNLLIEPFHEHNSHPMKDYLMYIDAVKQVLARRDVIQAEHDM 240
+S+ + L+K E + +KD L YI ++K ++ RD Q +++
Sbjct: 64 KIFSESLSQFSTSLRVLNKYT-DENYLTS----LKDLLHYILSLKNLIKLRDQKQLDYEE 118
Query: 241 CGEELQKKTAEKEQLTN 257
+ L E + T+
Sbjct: 119 LSDYLLTDEVENAKETS 135
>gnl|CDD|132793 cd06883, PX_PI3K_C2, The phosphoinositide binding Phox Homology
Domain of Class II Phosphoinositide 3-Kinases. The PX
domain is a phosphoinositide (PI) binding module
present in many proteins with diverse functions. The
Phosphoinositide 3-Kinase (PI3K) family of enzymes
catalyzes the phosphorylation of the 3-hydroxyl group
of the inositol ring of phosphatidylinositol. PI3Ks
play an important role in a variety of fundamental
cellular processes, including cell motility, the Ras
pathway, vesicle trafficking and secretion, immune cell
activation and apoptosis. They are also involved in the
regulation of clathrin-mediated membrane trafficking as
well as ATP-dependent priming of neurosecretory granule
exocytosis. PI3Ks are divided into three main classes
(I, II, and III) based on their substrate specificity,
regulation, and domain structure. Class II PI3Ks
preferentially use PI as a substrate to produce PI3P,
but can also phosphorylate PI4P to produce PI(3,4)P2.
They function as monomers and do not associate with any
regulatory subunits. Class II enzymes contain an
N-terminal Ras binding domain, a lipid binding C2
domain, a PI3K homology domain of unknown function, an
ATP-binding cataytic domain, a PX domain, and a second
C2 domain at the C-terminus. Class II PI3Ks include
three vertebrate isoforms (alpha, beta, and gamma), the
Drosophila PI3K_68D, and similar proteins.
Length = 109
Score = 28.5 bits (64), Expect = 2.1
Identities = 12/28 (42%), Positives = 15/28 (53%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLP 37
V R + +F LHNKL PS +P P
Sbjct: 34 VFRTFEEFQELHNKLSLLFPSLKLPSFP 61
>gnl|CDD|132801 cd06891, PX_Vps17p, The phosphoinositide binding Phox Homology
domain of yeast sorting nexin Vps17p. The PX domain is
a phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. Vsp17p forms a dimer with
Vps5p, the yeast counterpart of human SNX1, and is part
of the retromer complex that mediates the transport of
the carboxypeptidase Y receptor Vps10p from endosomes to
Golgi. Similar to Vps5p and SNX1, Vps17p harbors a
Bin/Amphiphysin/Rvs (BAR) domain, which detects membrane
curvature, C-terminal to the PX domain. The PX-BAR
structural unit helps determine specific membrane
localization.
Length = 140
Score = 28.9 bits (65), Expect = 2.4
Identities = 18/64 (28%), Positives = 22/64 (34%), Gaps = 16/64 (25%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPE----------------KHSLLEHLNRYSKEF 53
VRR Y +F L L P +P LP K +L NR +
Sbjct: 66 VRRTYEEFQKLFKYLNGANPETFVPALPLPSTSYGSNNEEDARKLKANLQRWFNRVCSDP 125
Query: 54 ILCR 57
IL R
Sbjct: 126 ILIR 129
>gnl|CDD|132797 cd06887, PX_p47phox, The phosphoinositide binding Phox Homology
domain of the p47phox subunit of NADPH oxidase. The PX
domain is a phosphoinositide (PI) binding module
present in many proteins with diverse functions such as
cell signaling, vesicular trafficking, protein sorting,
and lipid modification, among others. p47phox is a
cytosolic subunit of the phagocytic NADPH oxidase
complex (also called Nox2 or gp91phox), which plays a
key role in the ability of phagocytes to defend against
bacterial infections. NADPH oxidase catalyzes the
transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p47phox is required for activation of NADH
oxidase and plays a role in translocation. It contains
an N-terminal PX domain, two Src Homology 3 (SH3)
domains, and a C-terminal domain that contains PxxP
motifs for binding SH3 domains. The PX domain of
p47phox is unique in that it contains two distinct
basic pockets on the membrane-binding surface: one
preferentially binds
phosphatidylinositol-3,4-bisphosphate [PI(3,4)P2] and
is analogous to the PI3P-binding pocket of p40phox,
while the other binds anionic phospholipids such as
phosphatidic acid or phosphatidylserine. Simultaneous
binding in the two pockets results in increased
membrane affinity. The PX domain of p47phox is also
involved in protein-protein interaction.
Length = 118
Score = 28.3 bits (63), Expect = 2.4
Identities = 13/41 (31%), Positives = 18/41 (43%), Gaps = 9/41 (21%)
Query: 6 TECIVRRRYNDFVWLHNKLVETLP---------SHIIPPLP 37
+E +V RR+ + H L E P + IIP LP
Sbjct: 31 SEKLVYRRFTEIYEFHKTLKEMFPIEAGDINKENRIIPHLP 71
>gnl|CDD|132810 cd07277, PX_RUN, The phosphoinositide binding Phox Homology
domain of uncharacterized proteins containing PX and
RUN domains. The PX domain is a phosphoinositide (PI)
binding module involved in targeting proteins to
PI-enriched membranes. Members in this subfamily are
uncharacterized proteins containing an N-terminal RUN
domain and a C-terminal PX domain. PX domain harboring
proteins have been implicated in highly diverse
functions such as cell signaling, vesicular
trafficking, protein sorting, lipid modification, cell
polarity and division, activation of T and B cells, and
cell survival. In addition to protein-lipid
interaction, the PX domain may also be involved in
protein-protein interaction. The RUN domain is found in
GTPases in the Rap and Rab families and may play a role
in Ras-like signaling pathways.
Length = 118
Score = 28.5 bits (64), Expect = 2.6
Identities = 22/64 (34%), Positives = 30/64 (46%), Gaps = 4/64 (6%)
Query: 5 DTECIVRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQF 64
D E V RRY++F LH KL + P P K + + +F+ R K L +
Sbjct: 29 DDEWNVYRRYSEFYELHKKLKKKFPVVRSFDFPPK----KAIGNKDAKFVEERRKRLQVY 84
Query: 65 LRRV 68
LRRV
Sbjct: 85 LRRV 88
>gnl|CDD|153283 cd07599, BAR_Rvs167p, The Bin/Amphiphysin/Rvs (BAR) domain of
Saccharomyces cerevisiae Reduced viability upon
starvation protein 167 and similar proteins. BAR
domains are dimerization, lipid binding and curvature
sensing modules found in many different proteins with
diverse functions. This subfamily is composed of fungal
proteins with similarity to Saccharomyces cerevisiae
Reduced viability upon starvation protein 167 (Rvs167p)
and Schizosaccharomyces pombe Hob1 (homolog of Bin1). S.
cerevisiae Rvs167p plays a role in regulation of the
actin cytoskeleton, endocytosis, and sporulation. It
forms a heterodimer with another BAR domain protein
Rvs161p. Rvs161p and Rvs167p share common functions but
are not interchangeable. Their BAR domains cannot be
replaced with each other and the overexpression of one
cannot suppress the mutant phenotypes of the other.
Rvs167p also interacts with the GTPase activating
protein (GAP) Gyp5p, which is involved in ER to Golgi
vesicle trafficking. BAR domains form dimers that bind
to membranes, induce membrane bending and curvature, and
may also be involved in protein-protein interactions.
Length = 216
Score = 28.8 bits (65), Expect = 3.7
Identities = 33/144 (22%), Positives = 57/144 (39%), Gaps = 13/144 (9%)
Query: 119 MSLRHHHSEFEQFSQYISNLYEKISAFEKIGTRLYKERKDYVSEAHQFAIVLNTWAGYEP 178
SL+ + + F ++ AF K LY V P
Sbjct: 16 KSLKKLIEQSKAFRDSWRSILTHQIAFAKEFAELYDP---IVGPKESVGS--------HP 64
Query: 179 QLSSVIRQVSKAVDTTASLHKNLL--IEPFHEHNSHPMKDYLMYIDAVKQVLARRDVIQA 236
S + ++S+ V L K LL +E F E P K+ YI +++ + +RD +
Sbjct: 65 APESTLARLSRYVKALEELKKELLEELEFFEERVILPAKELKKYIKKIRKTIKKRDHKKL 124
Query: 237 EHDMCGEELQKKTAEKEQLTNKDS 260
++D +L K +K++L+ KD
Sbjct: 125 DYDKLQNKLNKLLQKKKELSLKDE 148
>gnl|CDD|132782 cd06872, PX_SNX19_like_plant, The phosphoinositide binding Phox
Homology domain of uncharacterized SNX19-like plant
proteins. The PX domain is a phosphoinositide (PI)
binding module involved in targeting proteins to
PI-enriched membranes. Members in this subfamily are
uncharacterized plant proteins containing an N-terminal
PXA domain, a central PX domain, and a C-terminal
domain that is conserved in some sorting nexins (SNXs).
This is the same domain architecture found in SNX19.
SNX13 and SNX14 also contain these three domains but
also contain a regulator of G protein signaling (RGS)
domain in between the PXA and PX domains. SNXs make up
the largest group among PX domain containing proteins.
They are involved in regulating membrane traffic and
protein sorting in the endosomal system. The PX domain
of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence
of other protein-protein interaction domains, which
help determine subcellular localization and specific
function in the endocytic pathway. In addition to
protein-lipid interaction, the PX domain may also be
involved in protein-protein interaction.
Length = 107
Score = 27.5 bits (61), Expect = 4.1
Identities = 22/59 (37%), Positives = 33/59 (55%), Gaps = 5/59 (8%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEKHSLLEHLNRYSKEFILCRMKLLDQFLRRV 68
V+RR+ +F LH +L E +P + + LP K L L FI R KLLD++L+ +
Sbjct: 35 VKRRFRNFETLHRRLKE-VPKYNL-ELPPKRFLSSSL---DGAFIEERCKLLDKYLKDL 88
>gnl|CDD|227889 COG5602, SIN3, Histone deacetylase complex, SIN3 component
[Chromatin structure and dynamics].
Length = 1163
Score = 29.1 bits (65), Expect = 4.3
Identities = 16/67 (23%), Positives = 31/67 (46%), Gaps = 9/67 (13%)
Query: 288 LEKLSTAIPKLTSQLEICDEKLQTANNHLRSDLERWR-LEKKNDLKKILLKIADQQIAYY 346
L+K IP + +L++ DE+ ++ + WR +E+KN K + D Q +
Sbjct: 630 LKKPHVTIPIVLKRLKMKDEEWRSCKREWN---KIWREIEEKNYHKSL-----DHQGVSF 681
Query: 347 QQRSDRG 353
+ R +
Sbjct: 682 KSRDKKI 688
>gnl|CDD|99979 cd03807, GT1_WbnK_like, This family is most closely related to the
GT1 family of glycosyltransferases. WbnK in Shigella
dysenteriae has been shown to be involved in the type 7
O-antigen biosynthesis.
Length = 365
Score = 28.3 bits (64), Expect = 7.3
Identities = 6/20 (30%), Positives = 10/20 (50%)
Query: 212 HPMKDYLMYIDAVKQVLARR 231
HP KD+ + A +L +
Sbjct: 203 HPQKDHATLLRAAALLLKKF 222
>gnl|CDD|214937 smart00957, SecA_DEAD, SecA DEAD-like domain. SecA protein binds
to the plasma membrane where it interacts with proOmpA
to support translocation of proOmpA through the
membrane. SecA protein achieves this translocation, in
association with SecY protein, in an ATP dependent
manner. This domain represents the N-terminal
ATP-dependent helicase domain, which is related to the.
Length = 380
Score = 28.2 bits (64), Expect = 7.7
Identities = 16/38 (42%), Positives = 22/38 (57%), Gaps = 4/38 (10%)
Query: 224 VKQVLARRDVIQAEHDMCGEELQKKTAE-KEQLTNKDS 260
V Q+ A ++A D EEL+ KTAE KE+L +S
Sbjct: 20 VDQINALEPEMEALSD---EELRAKTAEFKERLAEGES 54
>gnl|CDD|132796 cd06886, PX_SNX27, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 27. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system.
The PX domain of SNXs binds PIs and targets the protein
to PI-enriched membranes. SNXs differ from each other
in PI-binding specificity and affinity, and the
presence of other protein-protein interaction domains,
which help determine subcellular localization and
specific function in the endocytic pathway. SNX27
contains an N-terminal PDZ domain followed by a PX
domain and a Ras-Associated (RA) domain. It binds G
protein-gated potassium (Kir3) channels, which play a
role in neuronal excitability control, through its PDZ
domain. SNX27 downregulates Kir3 channels by promoting
their movement in the endosome, reducing surface
expression and increasing degradation. SNX27 also
associates with 5-hydroxytryptamine type 4 receptor
(5-HT4R), cytohesin associated scaffolding protein
(CASP), and diacylglycerol kinase zeta, and may play a
role in their intracellular trafficking and endocytic
recycling. The SNX27 PX domain preferentially binds to
phosphatidylinositol-3-phosphate (PI3P) and is
important for targeting to the early endosome.
Length = 106
Score = 26.6 bits (59), Expect = 7.7
Identities = 22/65 (33%), Positives = 30/65 (46%), Gaps = 11/65 (16%)
Query: 9 IVRRRYNDFVWLHNKLVETLPSHIIPPLPEK--HSLLEH-LNRYSKEFILCRMKLLDQFL 65
+ RRY +F LH L + P P LP K SL E L+ R + L+Q+L
Sbjct: 33 LCSRRYREFANLHQNLKKEFPDFQFPKLPGKWPFSLSEQQLDA--------RRRGLEQYL 84
Query: 66 RRVTS 70
+V S
Sbjct: 85 EKVCS 89
>gnl|CDD|132833 cd07300, PX_SNX20, The phosphoinositide binding Phox Homology
domain of Sorting Nexin 20. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. Sorting nexins (SNXs)
make up the largest group among PX domain containing
proteins. They are involved in regulating membrane
traffic and protein sorting in the endosomal system. The
PX domain of SNXs binds PIs and targets the protein to
PI-enriched membranes. SNXs differ from each other in
PI-binding specificity and affinity, and the presence of
other protein-protein interaction domains, which help
determine subcellular localization and specific function
in the endocytic pathway. Some SNXs are localized in
early endosome structures such as clathrin-coated pits,
while others are located in late structures of the
endocytic pathway. SNX20 interacts with P-Selectin
glycoprotein ligand-1 (PSGL-1), a surface-expressed
mucin that acts as a ligand for the selectin family of
adhesion proteins. The PX domain of SNX20 binds PIs and
targets the SNX20/PSGL-1 complex to endosomes. SNX20 may
function in the sorting and cycling of PSGL-1 into
endosomes.
Length = 114
Score = 26.7 bits (59), Expect = 8.4
Identities = 21/84 (25%), Positives = 36/84 (42%), Gaps = 5/84 (5%)
Query: 3 FPDTECIVRRRYNDFVWLHNKLVETLPSHIIP-PLPEKHSLLEHLNRYSKEFILCRMKLL 61
F + ++ RRY+DF+ LH +L+ + P+K +S+E I R L
Sbjct: 31 FDCNKVVIERRYSDFLKLHQELLSDFSEELEDVVFPKKKL----TGNFSEEIIAERRVAL 86
Query: 62 DQFLRRVTSHPVLSVNSHAIIFLT 85
+L + S + + FLT
Sbjct: 87 RDYLTLLYSLRFVRRSQAFQDFLT 110
>gnl|CDD|132823 cd07290, PX_PI3K_C2_beta, The phosphoinositide binding Phox
Homology Domain of the Beta Isoform of Class II
Phosphoinositide 3-Kinases. The PX domain is a
phosphoinositide (PI) binding module present in many
proteins with diverse functions. The Phosphoinositide
3-Kinase (PI3K) family of enzymes catalyzes the
phosphorylation of the 3-hydroxyl group of the inositol
ring of phosphatidylinositol. PI3Ks play an important
role in a variety of fundamental cellular processes,
including cell motility, the Ras pathway, vesicle
trafficking and secretion, immune cell activation and
apoptosis. PI3Ks are divided into three main classes
(I, II, and III) based on their substrate specificity,
regulation, and domain structure. Class II PI3Ks
preferentially use PI as a substrate to produce PI3P,
but can also phosphorylate PI4P to produce PI(3,4)P2.
They function as monomers and do not associate with any
regulatory subunits. Class II enzymes contain an
N-terminal Ras binding domain, a lipid binding C2
domain, a PI3K homology domain of unknown function, an
ATP-binding cataytic domain, a PX domain, and a second
C2 domain at the C-terminus. The class II beta isoform,
PI3K-C2beta, contributes to the migration and survival
of cancer cells. It regulates Rac activity and impacts
membrane ruffling, cell motility, and cadherin-mediated
cell-cell adhesion. The PX domain is involved in
targeting of proteins to PI-enriched membranes, and may
also be involved in protein-protein interaction.
Length = 109
Score = 26.8 bits (59), Expect = 8.7
Identities = 12/30 (40%), Positives = 17/30 (56%)
Query: 10 VRRRYNDFVWLHNKLVETLPSHIIPPLPEK 39
V+R + +F LHNKL PS +P P +
Sbjct: 34 VQRTFEEFQELHNKLRLLFPSSKLPSFPSR 63
>gnl|CDD|203795 pfam07889, DUF1664, Protein of unknown function (DUF1664). The
members of this family are hypothetical plant proteins
of unknown function. The region featured in this family
is approximately 100 amino acids long.
Length = 125
Score = 27.0 bits (60), Expect = 8.8
Identities = 15/64 (23%), Positives = 28/64 (43%), Gaps = 7/64 (10%)
Query: 277 YSLWKSTSEDRL-----EKLSTAIPKLTSQLEICDEKLQTANNHLRSDLER--WRLEKKN 329
Y WK S L +S A+ + QLE E + A HL ++ +L+++
Sbjct: 21 YMWWKGWSFSDLMFVTKRNMSDAVASVGKQLEKVSESIAAAKKHLSQRIDNLDDKLDEQK 80
Query: 330 DLKK 333
++ +
Sbjct: 81 EISE 84
>gnl|CDD|236325 PRK08654, PRK08654, pyruvate carboxylase subunit A; Validated.
Length = 499
Score = 28.0 bits (63), Expect = 8.8
Identities = 13/31 (41%), Positives = 17/31 (54%), Gaps = 7/31 (22%)
Query: 5 DTECIVRRRYNDFVWLHNKLVETLPSHIIPP 35
D EC ++RR H KL+E PS I+ P
Sbjct: 226 DRECSIQRR-------HQKLIEEAPSPIMTP 249
>gnl|CDD|224618 COG1704, LemA, Uncharacterized conserved protein [Function
unknown].
Length = 185
Score = 27.3 bits (61), Expect = 9.3
Identities = 9/23 (39%), Positives = 15/23 (65%)
Query: 11 RRRYNDFVWLHNKLVETLPSHII 33
RR YN+ V +N + + PS+I+
Sbjct: 138 RRLYNEAVRDYNVKIRSFPSNIV 160
Database: CDD.v3.10
Posted date: Mar 20, 2013 7:55 AM
Number of letters in database: 10,937,602
Number of sequences in database: 44,354
Lambda K H
0.317 0.130 0.376
Gapped
Lambda K H
0.267 0.0881 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 17,598,427
Number of extensions: 1638334
Number of successful extensions: 2029
Number of sequences better than 10.0: 1
Number of HSP's gapped: 1975
Number of HSP's successfully gapped: 123
Length of query: 357
Length of database: 10,937,602
Length adjustment: 98
Effective length of query: 259
Effective length of database: 6,590,910
Effective search space: 1707045690
Effective search space used: 1707045690
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.3 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.7 bits)
S2: 60 (26.6 bits)